3131310232157 has 2 divisors, whose sum is σ = 3131310232158. Its totient is φ = 3131310232156.

The previous prime is 3131310232051. The next prime is 3131310232201. The reversal of 3131310232157 is 7512320131313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2060045901796 + 1071264330361 = 1435286^2 + 1035019^2 .

It is an emirp because it is prime and its reverse (7512320131313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3131310232157 - 2³⁶ = 3062590755421 is a prime.

It is a super-2 number, since 2×3131310232157² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3131310232957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1565655116078 + 1565655116079.

It is an arithmetic number, because the mean of its divisors is an integer number (1565655116079).

Almost surely, 2^{3131310232157} is an apocalyptic number.

It is an amenable number.

3131310232157 is a deficient number, since it is larger than the sum of its proper divisors (1).

3131310232157 is an equidigital number, since it uses as much as digits as its factorization.

3131310232157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 32.

The spelling of 3131310232157 in words is "three trillion, one hundred thirty-one billion, three hundred ten million, two hundred thirty-two thousand, one hundred fifty-seven".