231553320 has 32 divisors (see below), whose sum is σ = 694660320. Its totient is φ = 61747520.

The previous prime is 231553279. The next prime is 231553337. The reversal of 231553320 is 23355132.

It is a happy number.

231553320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 964686 + ... + 964925.

It is an arithmetic number, because the mean of its divisors is an integer number (21708135).

Almost surely, 2^231553320 is an apocalyptic number.

231553320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231553320 is an abundant number, since it is smaller than the sum of its proper divisors (463107000).

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

231553320 is a wasteful number, since it uses less digits than its factorization.

231553320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1929625 (or 1929621 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 24.

The square root of 231553320 is about 15216.8761577401. The cubic root of 231553320 is about 614.0687604914.

The spelling of 231553320 in words is "two hundred thirty-one million, five hundred fifty-three thousand, three hundred twenty".