231191632 has 40 divisors (see below), whose sum is σ = 512703296. Its totient is φ = 98931456.

The previous prime is 231191617. The next prime is 231191669. The reversal of 231191632 is 236191132.

231191632 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 231191632.

It is a congruent number.

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, 103843 + ... + 106045.

Almost surely, 2^231191632 is an apocalyptic number.

It is an amenable number.

231191632 is an abundant number, since it is smaller than the sum of its proper divisors (281511664).

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

231191632 is a wasteful number, since it uses less digits than its factorization.

231191632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3155 (or 3149 counting only the distinct ones).

The product of its digits is 1944, while the sum is 28.

The square root of 231191632 is about 15204.9870766140. The cubic root of 231191632 is about 613.7488672251.

The spelling of 231191632 in words is "two hundred thirty-one million, one hundred ninety-one thousand, six hundred thirty-two".