231121232 has 20 divisors (see below), whose sum is σ = 448108596. Its totient is φ = 115480320.

The previous prime is 231121217. The next prime is 231121237. The reversal of 231121232 is 232121132.

It can be written as a sum of positive squares in 2 ways, for example, as 109327936 + 121793296 = 10456^2 + 11036^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 231121232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231121237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23708 + ... + 32004.

Almost surely, 2^231121232 is an apocalyptic number.

It is an amenable number.

231121232 is a deficient number, since it is larger than the sum of its proper divisors (216987364).

231121232 is a wasteful number, since it uses less digits than its factorization.

231121232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10046 (or 10040 counting only the distinct ones).

The product of its digits is 144, while the sum is 17.

The square root of 231121232 is about 15202.6718704312. The cubic root of 231121232 is about 613.6865634898.

Adding to 231121232 its reverse (232121132), we get a palindrome (463242364).

The spelling of 231121232 in words is "two hundred thirty-one million, one hundred twenty-one thousand, two hundred thirty-two".