231560000280 has 192 divisors, whose sum is σ = 861657488640. Its totient is φ = 52830925056.

The previous prime is 231560000267. The next prime is 231560000281. The reversal of 231560000280 is 82000065132.

231560000280 is a `hidden beast` number, since 2 + 31 + 5 + 600 + 0 + 0 + 28 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231560000281) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1294447 + ... + 1462433.

It is an arithmetic number, because the mean of its divisors is an integer number (4487799420).

Almost surely, 2^231560000280 is an apocalyptic number.

231560000280 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 231560000280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (430828744320).

231560000280 is an abundant number, since it is smaller than the sum of its proper divisors (630097488360).

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

231560000280 is a wasteful number, since it uses less digits than its factorization.

231560000280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168558 (or 168551 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The spelling of 231560000280 in words is "two hundred thirty-one billion, five hundred sixty million, two hundred eighty", and thus it is an aban number.