31325401632521 has 2 divisors, whose sum is σ = 31325401632522. Its totient is φ = 31325401632520.

The previous prime is 31325401632439. The next prime is 31325401632533. The reversal of 31325401632521 is 12523610452313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18261434755600 + 13063966876921 = 4273340^2 + 3614411^2 .

It is a cyclic number.

It is not a de Polignac number, because 31325401632521 - 2³⁰ = 31324327890697 is a prime.

It is not a weakly prime, because it can be changed into another prime (31325401631521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15662700816260 + 15662700816261.

It is an arithmetic number, because the mean of its divisors is an integer number (15662700816261).

Almost surely, 2^{31325401632521} is an apocalyptic number.

It is an amenable number.

31325401632521 is a deficient number, since it is larger than the sum of its proper divisors (1).

31325401632521 is an equidigital number, since it uses as much as digits as its factorization.

31325401632521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 38.

The spelling of 31325401632521 in words is "thirty-one trillion, three hundred twenty-five billion, four hundred one million, six hundred thirty-two thousand, five hundred twenty-one".