232431131 has 2 divisors, whose sum is σ = 232431132. Its totient is φ = 232431130.

The previous prime is 232431127. The next prime is 232431163. The reversal of 232431131 is 131134232.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 232431131 - 2² = 232431127 is a prime.

It is a super-2 number, since 2×232431131² = 108048461315878322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (232431181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116215565 + 116215566.

It is an arithmetic number, because the mean of its divisors is an integer number (116215566).

Almost surely, 2^232431131 is an apocalyptic number.

232431131 is a deficient number, since it is larger than the sum of its proper divisors (1).

232431131 is an equidigital number, since it uses as much as digits as its factorization.

232431131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 20.

The square root of 232431131 is about 15245.6922112445. The cubic root of 232431131 is about 614.8437534641.

Adding to 232431131 its reverse (131134232), we get a palindrome (363565363).

The spelling of 232431131 in words is "two hundred thirty-two million, four hundred thirty-one thousand, one hundred thirty-one".