231253520 has 20 divisors (see below), whose sum is σ = 537664620. Its totient is φ = 92501376.

The previous prime is 231253507. The next prime is 231253553. The reversal of 231253520 is 25352132.

It can be written as a sum of positive squares in 2 ways, for example, as 105185536 + 126067984 = 10256^2 + 11228^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1445255 + ... + 1445414.

It is an arithmetic number, because the mean of its divisors is an integer number (26883231).

Almost surely, 2^231253520 is an apocalyptic number.

231253520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231253520 is an abundant number, since it is smaller than the sum of its proper divisors (306411100).

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

231253520 is a wasteful number, since it uses less digits than its factorization.

231253520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2890682 (or 2890676 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 231253520 is about 15207.0220621922. The cubic root of 231253520 is about 613.8036274267.

The spelling of 231253520 in words is "two hundred thirty-one million, two hundred fifty-three thousand, five hundred twenty".