51715522 has 4 divisors (see below), whose sum is σ = 77573286. Its totient is φ = 25857760.

The previous prime is 51715487. The next prime is 51715553. The reversal of 51715522 is 22551715.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22551715 = 5 ⋅4510343.

It can be written as a sum of positive squares in only one way, i.e., 51710481 + 5041 = 7191^2 + 71^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12928879 + ... + 12928882.

Almost surely, 2^51715522 is an apocalyptic number.

51715522 is a deficient number, since it is larger than the sum of its proper divisors (25857764).

51715522 is a wasteful number, since it uses less digits than its factorization.

51715522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25857763.

The product of its digits is 3500, while the sum is 28.

The square root of 51715522 is about 7191.3504990370. The cubic root of 51715522 is about 372.5692185529.

The spelling of 51715522 in words is "fifty-one million, seven hundred fifteen thousand, five hundred twenty-two".