31260056621 has 2 divisors, whose sum is σ = 31260056622. Its totient is φ = 31260056620.

The previous prime is 31260056587. The next prime is 31260056657. The reversal of 31260056621 is 12665006213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20796812521 + 10463244100 = 144211^2 + 102290^2 .

It is a cyclic number.

It is not a de Polignac number, because 31260056621 - 2⁶ = 31260056557 is a prime.

It is a super-2 number, since 2×31260056621² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31260056221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15630028310 + 15630028311.

It is an arithmetic number, because the mean of its divisors is an integer number (15630028311).

Almost surely, 2^31260056621 is an apocalyptic number.

It is an amenable number.

31260056621 is a deficient number, since it is larger than the sum of its proper divisors (1).

31260056621 is an equidigital number, since it uses as much as digits as its factorization.

31260056621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The spelling of 31260056621 in words is "thirty-one billion, two hundred sixty million, fifty-six thousand, six hundred twenty-one".