231439752 has 48 divisors (see below), whose sum is σ = 642112380. Its totient is φ = 75264000.

The previous prime is 231439721. The next prime is 231439753. The reversal of 231439752 is 257934132.

It can be written as a sum of positive squares in 2 ways, for example, as 228795876 + 2643876 = 15126^2 + 1626^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231439753) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36249 + ... + 42152.

Almost surely, 2^231439752 is an apocalyptic number.

It is an amenable number.

231439752 is an abundant number, since it is smaller than the sum of its proper divisors (410672628).

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

231439752 is a wasteful number, since it uses less digits than its factorization.

231439752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78454 (or 78447 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 231439752 is about 15213.1440537451. The cubic root of 231439752 is about 613.9683517023.

The spelling of 231439752 in words is "two hundred thirty-one million, four hundred thirty-nine thousand, seven hundred fifty-two".