51313008 has 40 divisors (see below), whose sum is σ = 134812800. Its totient is φ = 16813504.

The previous prime is 51313001. The next prime is 51313013. The reversal of 51313008 is 80031315.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51313001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6228 + ... + 11891.

It is an arithmetic number, because the mean of its divisors is an integer number (3370320).

Almost surely, 2^51313008 is an apocalyptic number.

It is an amenable number.

51313008 is an abundant number, since it is smaller than the sum of its proper divisors (83499792).

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

51313008 is a wasteful number, since it uses less digits than its factorization.

51313008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18189 (or 18183 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 51313008 is about 7163.3098495039. The cubic root of 51313008 is about 371.6001021195.

The spelling of 51313008 in words is "fifty-one million, three hundred thirteen thousand, eight".