231033156 has 24 divisors (see below), whose sum is σ = 545574624. Its totient is φ = 76082880.

The previous prime is 231033149. The next prime is 231033161. The reversal of 231033156 is 651330132.

It is a happy number.

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, 114985 + ... + 116976.

It is an arithmetic number, because the mean of its divisors is an integer number (22732276).

Almost surely, 2^231033156 is an apocalyptic number.

It is an amenable number.

231033156 is an abundant number, since it is smaller than the sum of its proper divisors (314541468).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231033156 is a wasteful number, since it uses less digits than its factorization.

231033156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232051 (or 232049 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 231033156 is about 15199.7748667538. The cubic root of 231033156 is about 613.6085987428.

Adding to 231033156 its reverse (651330132), we get a palindrome (882363288).

The spelling of 231033156 in words is "two hundred thirty-one million, thirty-three thousand, one hundred fifty-six".