231897573 has 24 divisors (see below), whose sum is σ = 352287936. Its totient is φ = 152409600.

The previous prime is 231897563. The next prime is 231897613. The reversal of 231897573 is 375798132.

It is a happy number.

It is not a de Polignac number, because 231897573 - 2⁴ = 231897557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231897503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10533 + ... + 23973.

It is an arithmetic number, because the mean of its divisors is an integer number (14678664).

Almost surely, 2^231897573 is an apocalyptic number.

It is an amenable number.

231897573 is a deficient number, since it is larger than the sum of its proper divisors (120390363).

231897573 is an equidigital number, since it uses as much as digits as its factorization.

231897573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13527 (or 13515 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 231897573 is about 15228.1835095326. The cubic root of 231897573 is about 614.3729241837.

The spelling of 231897573 in words is "two hundred thirty-one million, eight hundred ninety-seven thousand, five hundred seventy-three".