31260056657 has 2 divisors, whose sum is σ = 31260056658. Its totient is φ = 31260056656.

The previous prime is 31260056621. The next prime is 31260056731. The reversal of 31260056657 is 75665006213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28751950096 + 2508106561 = 169564^2 + 50081^2 .

It is an emirp because it is prime and its reverse (75665006213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31260056657 - 2¹⁸ = 31259794513 is a prime.

It is a super-2 number, since 2×31260056657² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31260056057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15630028328 + 15630028329.

It is an arithmetic number, because the mean of its divisors is an integer number (15630028329).

Almost surely, 2^31260056657 is an apocalyptic number.

It is an amenable number.

31260056657 is a deficient number, since it is larger than the sum of its proper divisors (1).

31260056657 is an equidigital number, since it uses as much as digits as its factorization.

31260056657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 41.

The spelling of 31260056657 in words is "thirty-one billion, two hundred sixty million, fifty-six thousand, six hundred fifty-seven".