231662172 has 24 divisors (see below), whose sum is σ = 617766016. Its totient is φ = 66189168.

The previous prime is 231662161. The next prime is 231662173. The reversal of 231662172 is 271266132.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231662173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1378858 + ... + 1379025.

Almost surely, 2^231662172 is an apocalyptic number.

It is an amenable number.

231662172 is an abundant number, since it is smaller than the sum of its proper divisors (386103844).

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

231662172 is a wasteful number, since it uses less digits than its factorization.

231662172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2757897 (or 2757895 counting only the distinct ones).

The product of its digits is 6048, while the sum is 30.

The square root of 231662172 is about 15220.4524242875. The cubic root of 231662172 is about 614.1649689174.

The spelling of 231662172 in words is "two hundred thirty-one million, six hundred sixty-two thousand, one hundred seventy-two".