231888933 has 8 divisors (see below), whose sum is σ = 343539200. Its totient is φ = 154592604.

The previous prime is 231888931. The next prime is 231888971. The reversal of 231888933 is 339888132.

It is not a de Polignac number, because 231888933 - 2¹ = 231888931 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231888931) 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 7 ways as a sum of consecutive naturals, for example, 4294213 + ... + 4294266.

It is an arithmetic number, because the mean of its divisors is an integer number (42942400).

Almost surely, 2^231888933 is an apocalyptic number.

It is an amenable number.

231888933 is a deficient number, since it is larger than the sum of its proper divisors (111650267).

231888933 is an equidigital number, since it uses as much as digits as its factorization.

231888933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8588488 (or 8588482 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 231888933 is about 15227.8998223655. The cubic root of 231888933 is about 614.3652940219.

The spelling of 231888933 in words is "two hundred thirty-one million, eight hundred eighty-eight thousand, nine hundred thirty-three".