231232313731 has 2 divisors, whose sum is σ = 231232313732. Its totient is φ = 231232313730.

The previous prime is 231232313723. The next prime is 231232313747. The reversal of 231232313731 is 137313232132.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231232313731 - 2³ = 231232313723 is a prime.

It is a super-2 number, since 2×231232313731² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231232313693 and 231232313702.

It is not a weakly prime, because it can be changed into another prime (231232313831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115616156865 + 115616156866.

It is an arithmetic number, because the mean of its divisors is an integer number (115616156866).

Almost surely, 2^231232313731 is an apocalyptic number.

231232313731 is a deficient number, since it is larger than the sum of its proper divisors (1).

231232313731 is an equidigital number, since it uses as much as digits as its factorization.

231232313731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 31.

Adding to 231232313731 its reverse (137313232132), we get a palindrome (368545545863).

The spelling of 231232313731 in words is "two hundred thirty-one billion, two hundred thirty-two million, three hundred thirteen thousand, seven hundred thirty-one".