231560000 has 140 divisors (see below), whose sum is σ = 657014688. Its totient is φ = 79296000.

The previous prime is 231559967. The next prime is 231560027. The reversal of 231560000 is 65132.

It is a tau number, because it is divible by the number of its divisors (140).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 279587 + ... + 280413.

Almost surely, 2^231560000 is an apocalyptic number.

231560000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231560000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328507344).

231560000 is an abundant number, since it is smaller than the sum of its proper divisors (425454688).

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

231560000 is an frugal number, since it uses more digits than its factorization.

231560000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866 (or 841 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 231560000 is about 15217.0956493018. The cubic root of 231560000 is about 614.0746654523.

The spelling of 231560000 in words is "two hundred thirty-one million, five hundred sixty thousand".