31312343057 has 2 divisors, whose sum is σ = 31312343058. Its totient is φ = 31312343056.

The previous prime is 31312343021. The next prime is 31312343059. The reversal of 31312343057 is 75034321313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30804111121 + 508231936 = 175511^2 + 22544^2 .

It is a cyclic number.

It is not a de Polignac number, because 31312343057 - 2¹² = 31312338961 is a prime.

It is a super-2 number, since 2×31312343057² (a number of 22 digits) contains 22 as substring.

Together with 31312343059, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31312343059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15656171528 + 15656171529.

It is an arithmetic number, because the mean of its divisors is an integer number (15656171529).

Almost surely, 2^31312343057 is an apocalyptic number.

It is an amenable number.

31312343057 is a deficient number, since it is larger than the sum of its proper divisors (1).

31312343057 is an equidigital number, since it uses as much as digits as its factorization.

31312343057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 32.

The spelling of 31312343057 in words is "thirty-one billion, three hundred twelve million, three hundred forty-three thousand, fifty-seven".