31131102333157 has 2 divisors, whose sum is σ = 31131102333158. Its totient is φ = 31131102333156.

The previous prime is 31131102333113. The next prime is 31131102333197. The reversal of 31131102333157 is 75133320113113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31107680785476 + 23421547681 = 5577426^2 + 153041^2 .

It is an emirp because it is prime and its reverse (75133320113113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31131102333157 - 2³⁵ = 31096742594789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31131102333197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15565551166578 + 15565551166579.

It is an arithmetic number, because the mean of its divisors is an integer number (15565551166579).

Almost surely, 2^{31131102333157} is an apocalyptic number.

It is an amenable number.

31131102333157 is a deficient number, since it is larger than the sum of its proper divisors (1).

31131102333157 is an equidigital number, since it uses as much as digits as its factorization.

31131102333157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17010, while the sum is 34.

The spelling of 31131102333157 in words is "thirty-one trillion, one hundred thirty-one billion, one hundred two million, three hundred thirty-three thousand, one hundred fifty-seven".