51916608 has 84 divisors (see below), whose sum is σ = 149957028. Its totient is φ = 17172480.

The previous prime is 51916597. The next prime is 51916643. The reversal of 51916608 is 80661915.

It can be written as a sum of positive squares in 2 ways, for example, as 32626944 + 19289664 = 5712^2 + 4392^2 .

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, 99388 + ... + 99908.

Almost surely, 2^51916608 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 51916608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74978514).

51916608 is an abundant number, since it is smaller than the sum of its proper divisors (98040420).

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

51916608 is a wasteful number, since it uses less digits than its factorization.

51916608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712 (or 699 counting only the distinct ones).

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

The square root of 51916608 is about 7205.3180360065. The cubic root of 51916608 is about 373.0514822791.

The spelling of 51916608 in words is "fifty-one million, nine hundred sixteen thousand, six hundred eight".