31134432557 has 2 divisors, whose sum is σ = 31134432558. Its totient is φ = 31134432556.

The previous prime is 31134432533. The next prime is 31134432577. The reversal of 31134432557 is 75523443113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22580772361 + 8553660196 = 150269^2 + 92486^2 .

It is a cyclic number.

It is not a de Polignac number, because 31134432557 - 2²⁴ = 31117655341 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31134432557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31134432577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15567216278 + 15567216279.

It is an arithmetic number, because the mean of its divisors is an integer number (15567216279).

Almost surely, 2^31134432557 is an apocalyptic number.

It is an amenable number.

31134432557 is a deficient number, since it is larger than the sum of its proper divisors (1).

31134432557 is an equidigital number, since it uses as much as digits as its factorization.

31134432557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 38.

The spelling of 31134432557 in words is "thirty-one billion, one hundred thirty-four million, four hundred thirty-two thousand, five hundred fifty-seven".