631526256 has 120 divisors (see below), whose sum is σ = 1887200640. Its totient is φ = 196560000.

The previous prime is 631526213. The next prime is 631526257. The reversal of 631526256 is 652625136.

It is a happy number.

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 631526256.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631526257) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 192631 + ... + 195881.

It is an arithmetic number, because the mean of its divisors is an integer number (15726672).

Almost surely, 2^631526256 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 631526256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (943600320).

631526256 is an abundant number, since it is smaller than the sum of its proper divisors (1255674384).

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

631526256 is a wasteful number, since it uses less digits than its factorization.

631526256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3355 (or 3346 counting only the distinct ones).

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

The square root of 631526256 is about 25130.1861513201. The cubic root of 631526256 is about 857.9536056548.

The spelling of 631526256 in words is "six hundred thirty-one million, five hundred twenty-six thousand, two hundred fifty-six".