231131224957 has 2 divisors, whose sum is σ = 231131224958. Its totient is φ = 231131224956.

The previous prime is 231131224861. The next prime is 231131224963. The reversal of 231131224957 is 759422131132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 229082847876 + 2048377081 = 478626^2 + 45259^2 .

It is a cyclic number.

It is not a de Polignac number, because 231131224957 - 2²⁷ = 230997007229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231131224967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115565612478 + 115565612479.

It is an arithmetic number, because the mean of its divisors is an integer number (115565612479).

Almost surely, 2^231131224957 is an apocalyptic number.

It is an amenable number.

231131224957 is a deficient number, since it is larger than the sum of its proper divisors (1).

231131224957 is an equidigital number, since it uses as much as digits as its factorization.

231131224957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 40.

The spelling of 231131224957 in words is "two hundred thirty-one billion, one hundred thirty-one million, two hundred twenty-four thousand, nine hundred fifty-seven".