231715372807 has 2 divisors, whose sum is σ = 231715372808. Its totient is φ = 231715372806.

The previous prime is 231715372771. The next prime is 231715372813. The reversal of 231715372807 is 708273517132.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231715372807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231715372817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115857686403 + 115857686404.

It is an arithmetic number, because the mean of its divisors is an integer number (115857686404).

Almost surely, 2^231715372807 is an apocalyptic number.

231715372807 is a deficient number, since it is larger than the sum of its proper divisors (1).

231715372807 is an equidigital number, since it uses as much as digits as its factorization.

231715372807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 493920, while the sum is 46.

Adding to 231715372807 its reverse (708273517132), we get a palindrome (939988889939).

The spelling of 231715372807 in words is "two hundred thirty-one billion, seven hundred fifteen million, three hundred seventy-two thousand, eight hundred seven".