51322656 has 192 divisors, whose sum is σ = 172440576. Its totient is φ = 12979200.

The previous prime is 51322627. The next prime is 51322681. The reversal of 51322656 is 65622315.

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, 391711 + ... + 391841.

It is an arithmetic number, because the mean of its divisors is an integer number (898128).

Almost surely, 2^51322656 is an apocalyptic number.

51322656 is a gapful number since it is divisible by the number (56) 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 51322656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86220288).

51322656 is an abundant number, since it is smaller than the sum of its proper divisors (121117920).

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

51322656 is a wasteful number, since it uses less digits than its factorization.

51322656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215 (or 207 counting only the distinct ones).

The product of its digits is 10800, while the sum is 30.

The square root of 51322656 is about 7163.9832495617. The cubic root of 51322656 is about 371.6233903866.

The spelling of 51322656 in words is "fifty-one million, three hundred twenty-two thousand, six hundred fifty-six".