231578320 has 40 divisors (see below), whose sum is σ = 539490024. Its totient is φ = 92447232.

The previous prime is 231578317. The next prime is 231578323. The reversal of 231578320 is 23875132.

It is an interprime number because it is at equal distance from previous prime (231578317) and next prime (231578323).

It can be written as a sum of positive squares in 4 ways, for example, as 781456 + 230796864 = 884^2 + 15192^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231578323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41962 + ... + 47158.

Almost surely, 2^231578320 is an apocalyptic number.

231578320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231578320 is an abundant number, since it is smaller than the sum of its proper divisors (307911704).

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

231578320 is a wasteful number, since it uses less digits than its factorization.

231578320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5767 (or 5761 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 231578320 is about 15217.6975919487. The cubic root of 231578320 is about 614.0908593131.

The spelling of 231578320 in words is "two hundred thirty-one million, five hundred seventy-eight thousand, three hundred twenty".