51425856 has 168 divisors, whose sum is σ = 160609280. Its totient is φ = 15676416.

The previous prime is 51425851. The next prime is 51425909. The reversal of 51425856 is 65852415.

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 51425856.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51425851) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 404865 + ... + 404991.

Almost surely, 2^51425856 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 51425856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80304640).

51425856 is an abundant number, since it is smaller than the sum of its proper divisors (109183424).

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

51425856 is a wasteful number, since it uses less digits than its factorization.

51425856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201 (or 188 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

The square root of 51425856 is about 7171.1823292955. The cubic root of 51425856 is about 371.8723113616.

The spelling of 51425856 in words is "fifty-one million, four hundred twenty-five thousand, eight hundred fifty-six".