231151232 has 64 divisors (see below), whose sum is σ = 505469160. Its totient is φ = 104632320.

The previous prime is 231151229. The next prime is 231151241. The reversal of 231151232 is 232151132.

It can be written as a sum of positive squares in 4 ways, for example, as 211295296 + 19855936 = 14536^2 + 4456^2 .

It is a tau number, because it is divible by the number of its divisors (64).

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, 86882 + ... + 89502.

Almost surely, 2^231151232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231151232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252734580).

231151232 is an abundant number, since it is smaller than the sum of its proper divisors (274317928).

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

231151232 is a wasteful number, since it uses less digits than its factorization.

231151232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2701 (or 2689 counting only the distinct ones).

The product of its digits is 360, while the sum is 20.

The square root of 231151232 is about 15203.6585070831. The cubic root of 231151232 is about 613.7131149238.

The spelling of 231151232 in words is "two hundred thirty-one million, one hundred fifty-one thousand, two hundred thirty-two".