231239272 has 96 divisors (see below), whose sum is σ = 518464800. Its totient is φ = 95760000.

The previous prime is 231239237. The next prime is 231239279. The reversal of 231239272 is 272932132.

231239272 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (231239279) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 921147 + ... + 921397.

It is an arithmetic number, because the mean of its divisors is an integer number (5400675).

Almost surely, 2^231239272 is an apocalyptic number.

231239272 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231239272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259232400).

231239272 is an abundant number, since it is smaller than the sum of its proper divisors (287225528).

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

231239272 is a wasteful number, since it uses less digits than its factorization.

231239272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335 (or 312 counting only the distinct ones).

The product of its digits is 9072, while the sum is 31.

The square root of 231239272 is about 15206.5535871873. The cubic root of 231239272 is about 613.7910212709.

The spelling of 231239272 in words is "two hundred thirty-one million, two hundred thirty-nine thousand, two hundred seventy-two".