231656253108 has 96 divisors (see below), whose sum is σ = 624248561664. Its totient is φ = 65492264448.

The previous prime is 231656253097. The next prime is 231656253121. The reversal of 231656253108 is 801352656132.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 231656253108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11471116 + ... + 11491292.

It is an arithmetic number, because the mean of its divisors is an integer number (6502589184).

Almost surely, 2^231656253108 is an apocalyptic number.

231656253108 is a gapful number since it is divisible by the number (28) 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 231656253108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (312124280832).

231656253108 is an abundant number, since it is smaller than the sum of its proper divisors (392592308556).

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

231656253108 is a wasteful number, since it uses less digits than its factorization.

231656253108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21621 (or 21619 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 231656253108 in words is "two hundred thirty-one billion, six hundred fifty-six million, two hundred fifty-three thousand, one hundred eight".