232131081 has 80 divisors (see below), whose sum is σ = 405315904. Its totient is φ = 117355392.

The previous prime is 232131079. The next prime is 232131089. The reversal of 232131081 is 180131232.

It is not a de Polignac number, because 232131081 - 2¹ = 232131079 is a prime.

It is a super-2 number, since 2×232131081² = 107769677532457122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (232131089) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3464610 + ... + 3464676.

Almost surely, 2^232131081 is an apocalyptic number.

232131081 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

232131081 is a deficient number, since it is larger than the sum of its proper divisors (173184823).

232131081 is an equidigital number, since it uses as much as digits as its factorization.

232131081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 232131081 is about 15235.8485487353. The cubic root of 232131081 is about 614.5790681656.

The spelling of 232131081 in words is "two hundred thirty-two million, one hundred thirty-one thousand, eighty-one".