232731431 has 2 divisors, whose sum is σ = 232731432. Its totient is φ = 232731430.

The previous prime is 232731407. The next prime is 232731461. The reversal of 232731431 is 134137232.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 232731431 - 2¹⁸ = 232469287 is a prime.

It is a super-2 number, since 2×232731431² = 108327837950615522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 232731431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (232731461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116365715 + 116365716.

It is an arithmetic number, because the mean of its divisors is an integer number (116365716).

Almost surely, 2^232731431 is an apocalyptic number.

232731431 is a deficient number, since it is larger than the sum of its proper divisors (1).

232731431 is an equidigital number, since it uses as much as digits as its factorization.

232731431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 26.

The square root of 232731431 is about 15255.5377158591. The cubic root of 232731431 is about 615.1084313186.

Adding to 232731431 its reverse (134137232), we get a palindrome (366868663).

The spelling of 232731431 in words is "two hundred thirty-two million, seven hundred thirty-one thousand, four hundred thirty-one".