51715828 has 12 divisors (see below), whose sum is σ = 91742980. Its totient is φ = 25503552.

The previous prime is 51715823. The next prime is 51715831. The reversal of 51715828 is 82851715.

It can be written as a sum of positive squares in 2 ways, for example, as 24383844 + 27331984 = 4938^2 + 5228^2 .

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51715823) 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, 88263 + ... + 88846.

Almost surely, 2^51715828 is an apocalyptic number.

It is an amenable number.

51715828 is a deficient number, since it is larger than the sum of its proper divisors (40027152).

51715828 is a wasteful number, since it uses less digits than its factorization.

51715828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177186 (or 177184 counting only the distinct ones).

The product of its digits is 22400, while the sum is 37.

The square root of 51715828 is about 7191.3717745643. The cubic root of 51715828 is about 372.5699533804.

The spelling of 51715828 in words is "fifty-one million, seven hundred fifteen thousand, eight hundred twenty-eight".