31310214977 has 2 divisors, whose sum is σ = 31310214978. Its totient is φ = 31310214976.

The previous prime is 31310214973. The next prime is 31310215033. The reversal of 31310214977 is 77941201313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30984448576 + 325766401 = 176024^2 + 18049^2 .

It is a cyclic number.

It is not a de Polignac number, because 31310214977 - 2² = 31310214973 is a prime.

It is a super-2 number, since 2×31310214977² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31310214977.

It is not a weakly prime, because it can be changed into another prime (31310214973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15655107488 + 15655107489.

It is an arithmetic number, because the mean of its divisors is an integer number (15655107489).

Almost surely, 2^31310214977 is an apocalyptic number.

It is an amenable number.

31310214977 is a deficient number, since it is larger than the sum of its proper divisors (1).

31310214977 is an equidigital number, since it uses as much as digits as its factorization.

31310214977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 38.

The spelling of 31310214977 in words is "thirty-one billion, three hundred ten million, two hundred fourteen thousand, nine hundred seventy-seven".