Are you sure this CPU can run a 64 bit OS?
I have an older Acer Aspire One AO-150 with only 1GB of memory and only runs in 32 bits.
EDIT:
according to https://ark.intel.com/es/products/87257/Intel-Celeron-Processor-N3050-2M-Cache-up-to-2_16-GHz
the CPU runs 64 bits.
The cpu of my older Asus is an Intel Atom N270 and it’s 32 bits only (https://ark.intel.com/es/products/36331/Intel-Atom-Processor-N270-512K-Cache-1_60-GHz-533-MHz-FSB)
So, could be the kernel as @elcste points out.