231665532 has 36 divisors (see below), whose sum is σ = 628808040. Its totient is φ = 66189984.

The previous prime is 231665527. The next prime is 231665561. The reversal of 231665532 is 235566132.

231665532 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 231665493 and 231665502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 196407 + ... + 197582.

It is an arithmetic number, because the mean of its divisors is an integer number (17466890).

Almost surely, 2^231665532 is an apocalyptic number.

It is an amenable number.

231665532 is an abundant number, since it is smaller than the sum of its proper divisors (397142508).

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

231665532 is a wasteful number, since it uses less digits than its factorization.

231665532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394010 (or 394001 counting only the distinct ones).

The product of its digits is 32400, while the sum is 33.

The square root of 231665532 is about 15220.5628016838. The cubic root of 231665532 is about 614.1679381611.

The spelling of 231665532 in words is "two hundred thirty-one million, six hundred sixty-five thousand, five hundred thirty-two".