231422636 has 12 divisors (see below), whose sum is σ = 405364512. Its totient is φ = 115604208.

The previous prime is 231422627. The next prime is 231422647. The reversal of 231422636 is 636224132.

It is a junction number, because it is equal to n+sod(n) for n = 231422599 and 231422608.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21815 + ... + 30638.

It is an arithmetic number, because the mean of its divisors is an integer number (33780376).

Almost surely, 2^231422636 is an apocalyptic number.

It is an amenable number.

231422636 is a deficient number, since it is larger than the sum of its proper divisors (173941876).

231422636 is a wasteful number, since it uses less digits than its factorization.

231422636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53560 (or 53558 counting only the distinct ones).

The product of its digits is 10368, while the sum is 29.

The square root of 231422636 is about 15212.5815034793. The cubic root of 231422636 is about 613.9532160982.

Adding to 231422636 its reverse (636224132), we get a palindrome (867646768).

The spelling of 231422636 in words is "two hundred thirty-one million, four hundred twenty-two thousand, six hundred thirty-six".