231024031157 has 2 divisors, whose sum is σ = 231024031158. Its totient is φ = 231024031156.

The previous prime is 231024031123. The next prime is 231024031169. The reversal of 231024031157 is 751130420132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 175421919556 + 55602111601 = 418834^2 + 235801^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231024031157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231024031457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115512015578 + 115512015579.

It is an arithmetic number, because the mean of its divisors is an integer number (115512015579).

Almost surely, 2^231024031157 is an apocalyptic number.

It is an amenable number.

231024031157 is a deficient number, since it is larger than the sum of its proper divisors (1).

231024031157 is an equidigital number, since it uses as much as digits as its factorization.

231024031157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 29.

Adding to 231024031157 its reverse (751130420132), we get a palindrome (982154451289).

The spelling of 231024031157 in words is "two hundred thirty-one billion, twenty-four million, thirty-one thousand, one hundred fifty-seven".