231922656 has 192 divisors, whose sum is σ = 798658560. Its totient is φ = 64074240.

The previous prime is 231922651. The next prime is 231922661. The reversal of 231922656 is 656229132.

It is an interprime number because it is at equal distance from previous prime (231922651) and next prime (231922661).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 231922656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231922651) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 186870 + ... + 188106.

It is an arithmetic number, because the mean of its divisors is an integer number (4159680).

Almost surely, 2^231922656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231922656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (399329280).

231922656 is an abundant number, since it is smaller than the sum of its proper divisors (566735904).

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

231922656 is a wasteful number, since it uses less digits than its factorization.

231922656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1294 (or 1280 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 231922656 is about 15229.0070588991. The cubic root of 231922656 is about 614.3950744234.

The spelling of 231922656 in words is "two hundred thirty-one million, nine hundred twenty-two thousand, six hundred fifty-six".