231328553 has 12 divisors (see below), whose sum is σ = 247082640. Its totient is φ = 215947656.

The previous prime is 231328547. The next prime is 231328561. The reversal of 231328553 is 355823132.

It is not a de Polignac number, because 231328553 - 2⁸ = 231328297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231328523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 603800 + ... + 604182.

It is an arithmetic number, because the mean of its divisors is an integer number (20590220).

Almost surely, 2^231328553 is an apocalyptic number.

It is an amenable number.

231328553 is a deficient number, since it is larger than the sum of its proper divisors (15754087).

231328553 is an frugal number, since it uses more digits than its factorization.

231328553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868 (or 485 counting only the distinct ones).

The product of its digits is 21600, while the sum is 32.

The square root of 231328553 is about 15209.4889131752. The cubic root of 231328553 is about 613.8700055837.

The spelling of 231328553 in words is "two hundred thirty-one million, three hundred twenty-eight thousand, five hundred fifty-three".