331642256 has 80 divisors (see below), whose sum is σ = 747273600. Its totient is φ = 140912640.

The previous prime is 331642217. The next prime is 331642291. The reversal of 331642256 is 652246133.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 595130 + ... + 595686.

It is an arithmetic number, because the mean of its divisors is an integer number (9340920).

Almost surely, 2^331642256 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 331642256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (373636800).

331642256 is an abundant number, since it is smaller than the sum of its proper divisors (415631344).

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

331642256 is a wasteful number, since it uses less digits than its factorization.

331642256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792 (or 786 counting only the distinct ones).

The product of its digits is 25920, while the sum is 32.

The square root of 331642256 is about 18211.0476359818. The cubic root of 331642256 is about 692.1867583735.

Adding to 331642256 its reverse (652246133), we get a palindrome (983888389).

The spelling of 331642256 in words is "three hundred thirty-one million, six hundred forty-two thousand, two hundred fifty-six".