51511316 has 12 divisors (see below), whose sum is σ = 90320832. Its totient is φ = 25705368.

The previous prime is 51511297. The next prime is 51511321. The reversal of 51511316 is 61311515.

It is a junction number, because it is equal to n+sod(n) for n = 51511291 and 51511300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10220 + ... + 14403.

It is an arithmetic number, because the mean of its divisors is an integer number (7526736).

Almost surely, 2^51511316 is an apocalyptic number.

It is an amenable number.

51511316 is a deficient number, since it is larger than the sum of its proper divisors (38809516).

51511316 is a wasteful number, since it uses less digits than its factorization.

51511316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25150 (or 25148 counting only the distinct ones).

The product of its digits is 450, while the sum is 23.

The square root of 51511316 is about 7177.1384269777. The cubic root of 51511316 is about 372.0781910637.

The spelling of 51511316 in words is "fifty-one million, five hundred eleven thousand, three hundred sixteen".