231111232 has 28 divisors (see below), whose sum is σ = 500304816. Its totient is φ = 105050240.

The previous prime is 231111229. The next prime is 231111233. The reversal of 231111232 is 232111132.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (231111233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163438 + ... + 164845.

Almost surely, 2^231111232 is an apocalyptic number.

231111232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

231111232 is an abundant number, since it is smaller than the sum of its proper divisors (269193584).

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

231111232 is a wasteful number, since it uses less digits than its factorization.

231111232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328306 (or 328296 counting only the distinct ones).

The product of its digits is 72, while the sum is 16.

The square root of 231111232 is about 15202.3429773177. The cubic root of 231111232 is about 613.6777125012.

Adding to 231111232 its reverse (232111132), we get a palindrome (463222364).

The spelling of 231111232 in words is "two hundred thirty-one million, one hundred eleven thousand, two hundred thirty-two".