31233091957 has 2 divisors, whose sum is σ = 31233091958. Its totient is φ = 31233091956.

The previous prime is 31233091873. The next prime is 31233091973. The reversal of 31233091957 is 75919033213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21736784356 + 9496307601 = 147434^2 + 97449^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31233091957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31233091997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15616545978 + 15616545979.

It is an arithmetic number, because the mean of its divisors is an integer number (15616545979).

Almost surely, 2^31233091957 is an apocalyptic number.

It is an amenable number.

31233091957 is a deficient number, since it is larger than the sum of its proper divisors (1).

31233091957 is an equidigital number, since it uses as much as digits as its factorization.

31233091957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 153090, while the sum is 43.

The spelling of 31233091957 in words is "thirty-one billion, two hundred thirty-three million, ninety-one thousand, nine hundred fifty-seven".