231432655 has 4 divisors (see below), whose sum is σ = 277719192. Its totient is φ = 185146120.

The previous prime is 231432631. The next prime is 231432709. The reversal of 231432655 is 556234132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 231432655 - 2⁵ = 231432623 is a prime.

It is a super-2 number, since 2×231432655² = 107122147600698050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 23143261 + ... + 23143270.

It is an arithmetic number, because the mean of its divisors is an integer number (69429798).

Almost surely, 2^231432655 is an apocalyptic number.

231432655 is a deficient number, since it is larger than the sum of its proper divisors (46286537).

231432655 is an equidigital number, since it uses as much as digits as its factorization.

231432655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46286536.

The product of its digits is 21600, while the sum is 31.

The square root of 231432655 is about 15212.9107997122. The cubic root of 231432655 is about 613.9620759467.

Adding to 231432655 its reverse (556234132), we get a palindrome (787666787).

It can be divided in two parts, 2314 and 32655, that added together give a square (34969 = 187²).

The spelling of 231432655 in words is "two hundred thirty-one million, four hundred thirty-two thousand, six hundred fifty-five".