51372516 has 48 divisors (see below), whose sum is σ = 130156544. Its totient is φ = 15676416.

The previous prime is 51372481. The next prime is 51372527. The reversal of 51372516 is 61527315.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18516 + ... + 21108.

Almost surely, 2^51372516 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 51372516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65078272).

51372516 is an abundant number, since it is smaller than the sum of its proper divisors (78784028).

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

51372516 is a wasteful number, since it uses less digits than its factorization.

51372516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2740 (or 2738 counting only the distinct ones).

The product of its digits is 6300, while the sum is 30.

The square root of 51372516 is about 7167.4623124227. The cubic root of 51372516 is about 371.7436955732.

The spelling of 51372516 in words is "fifty-one million, three hundred seventy-two thousand, five hundred sixteen".