232431581 has 2 divisors, whose sum is σ = 232431582. Its totient is φ = 232431580.

The previous prime is 232431569. The next prime is 232431611. The reversal of 232431581 is 185134232.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 195720100 + 36711481 = 13990^2 + 6059^2 .

It is a cyclic number.

It is not a de Polignac number, because 232431581 - 2²² = 228237277 is a prime.

It is a super-2 number, since 2×232431581² = 108048879692319122, which contains 22 as substring.

It is a congruent number.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116215790 + 116215791.

It is an arithmetic number, because the mean of its divisors is an integer number (116215791).

Almost surely, 2^232431581 is an apocalyptic number.

It is an amenable number.

232431581 is a deficient number, since it is larger than the sum of its proper divisors (1).

232431581 is an equidigital number, since it uses as much as digits as its factorization.

232431581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 29.

The square root of 232431581 is about 15245.7069695046. The cubic root of 232431581 is about 614.8441502548.

The spelling of 232431581 in words is "two hundred thirty-two million, four hundred thirty-one thousand, five hundred eighty-one".