51960816 has 60 divisors (see below), whose sum is σ = 147439968. Its totient is φ = 17079552.

The previous prime is 51960809. The next prime is 51960869. The reversal of 51960816 is 61806915.

51960816 is a `hidden beast` number, since 519 + 60 + 81 + 6 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8041 + ... + 12983.

Almost surely, 2^51960816 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 51960816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73719984).

51960816 is an abundant number, since it is smaller than the sum of its proper divisors (95479152).

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

51960816 is a wasteful number, since it uses less digits than its factorization.

51960816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5030 (or 5021 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 51960816 is about 7208.3851173477. The cubic root of 51960816 is about 373.1573390992.

The spelling of 51960816 in words is "fifty-one million, nine hundred sixty thousand, eight hundred sixteen".