231380172 has 48 divisors (see below), whose sum is σ = 600969600. Its totient is φ = 76986000.

The previous prime is 231380131. The next prime is 231380213. The reversal of 231380172 is 271083132.

231380172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (231380131) and next prime (231380213).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69547 + ... + 72797.

It is an arithmetic number, because the mean of its divisors is an integer number (12520200).

Almost surely, 2^231380172 is an apocalyptic number.

It is an amenable number.

231380172 is an abundant number, since it is smaller than the sum of its proper divisors (369589428).

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

231380172 is a wasteful number, since it uses less digits than its factorization.

231380172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3923 (or 3915 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 231380172 is about 15211.1857525967. The cubic root of 231380172 is about 613.9156621456.

The spelling of 231380172 in words is "two hundred thirty-one million, three hundred eighty thousand, one hundred seventy-two".