231526656 has 81 divisors (see below), whose sum is σ = 669660901. Its totient is φ = 76932096.

The previous prime is 231526651. The next prime is 231526661. The reversal of 231526656 is 656625132.

It is a happy number.

The square root of 231526656 is 15216.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (231526651) and next prime (231526661).

It can be written as a sum of positive squares in only one way, i.e., 12960000 + 218566656 = 3600^2 + 14784^2 .

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231526656.

It is not an unprimeable number, because it can be changed into a prime (231526651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 730210 + ... + 730526.

Almost surely, 2^231526656 is an apocalyptic number.

231526656 is the 15216-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231526656

231526656 is an abundant number, since it is smaller than the sum of its proper divisors (438134245).

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

231526656 is an frugal number, since it uses more digits than its factorization.

231526656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656 (or 322 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The cubic root of 231526656 is about 614.0451890192.

Multiplying 231526656 by its sum of digits (36), we get a square (8334959616 = 91296²).

231526656 divided by its sum of digits (36) gives a square (6431296 = 2536²).

The spelling of 231526656 in words is "two hundred thirty-one million, five hundred twenty-six thousand, six hundred fifty-six".