231420836 has 24 divisors (see below), whose sum is σ = 430090080. Its totient is φ = 108646272.

The previous prime is 231420803. The next prime is 231420857. The reversal of 231420836 is 638024132.

It is a junction number, because it is equal to n+sod(n) for n = 231420799 and 231420808.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4886 + ... + 22061.

It is an arithmetic number, because the mean of its divisors is an integer number (17920420).

Almost surely, 2^231420836 is an apocalyptic number.

It is an amenable number.

231420836 is a deficient number, since it is larger than the sum of its proper divisors (198669244).

231420836 is a wasteful number, since it uses less digits than its factorization.

231420836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27083 (or 27081 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 231420836 is about 15212.5223418078. The cubic root of 231420836 is about 613.9516243227.

Adding to 231420836 its reverse (638024132), we get a palindrome (869444968).

The spelling of 231420836 in words is "two hundred thirty-one million, four hundred twenty thousand, eight hundred thirty-six".