231132641731 has 2 divisors, whose sum is σ = 231132641732. Its totient is φ = 231132641730.

The previous prime is 231132641717. The next prime is 231132641743. The reversal of 231132641731 is 137146231132.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231132641731 is a prime.

It is a super-2 number, since 2×231132641731² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (231132644731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115566320865 + 115566320866.

It is an arithmetic number, because the mean of its divisors is an integer number (115566320866).

Almost surely, 2^231132641731 is an apocalyptic number.

231132641731 is a deficient number, since it is larger than the sum of its proper divisors (1).

231132641731 is an equidigital number, since it uses as much as digits as its factorization.

231132641731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 34.

Adding to 231132641731 its reverse (137146231132), we get a palindrome (368278872863).

The spelling of 231132641731 in words is "two hundred thirty-one billion, one hundred thirty-two million, six hundred forty-one thousand, seven hundred thirty-one".