51313516 has 12 divisors (see below), whose sum is σ = 90001800. Its totient is φ = 25598720.

The previous prime is 51313513. The next prime is 51313517. The reversal of 51313516 is 61531315.

It is a pancake number, because a pancake can be divided into 51313516 parts by 10130 straight cuts.

It is not an unprimeable number, because it can be changed into a prime (51313511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12490 + ... + 16081.

It is an arithmetic number, because the mean of its divisors is an integer number (7500150).

Almost surely, 2^51313516 is an apocalyptic number.

It is an amenable number.

51313516 is a deficient number, since it is larger than the sum of its proper divisors (38688284).

51313516 is a wasteful number, since it uses less digits than its factorization.

51313516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29024 (or 29022 counting only the distinct ones).

The product of its digits is 1350, while the sum is 25.

The square root of 51313516 is about 7163.3453078851. The cubic root of 51313516 is about 371.6013283987.

The spelling of 51313516 in words is "fifty-one million, three hundred thirteen thousand, five hundred sixteen".