231904 has 12 divisors (see below), whose sum is σ = 456624. Its totient is φ = 115936.

The previous prime is 231901. The next prime is 231919. The reversal of 231904 is 409132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3592 + ... + 3655.

It is an arithmetic number, because the mean of its divisors is an integer number (38052).

2²³¹⁹⁰⁴ is an apocalyptic number.

It is an amenable number.

231904 is a deficient number, since it is larger than the sum of its proper divisors (224720).

231904 is an equidigital number, since it uses as much as digits as its factorization.

231904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7257 (or 7249 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 231904 is about 481.5641182646. The cubic root of 231904 is about 61.4378599877.

The spelling of 231904 in words is "two hundred thirty-one thousand, nine hundred four".