51526538 has 12 divisors (see below), whose sum is σ = 89908722. Its totient is φ = 22082760.

The previous prime is 51526511. The next prime is 51526543. The reversal of 51526538 is 83562515.

It can be written as a sum of positive squares in only one way, i.e., 47927929 + 3598609 = 6923^2 + 1897^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51526498 and 51526507.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 262793 + ... + 262988.

Almost surely, 2^51526538 is an apocalyptic number.

51526538 is a deficient number, since it is larger than the sum of its proper divisors (38382184).

51526538 is a wasteful number, since it uses less digits than its factorization.

51526538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525797 (or 525790 counting only the distinct ones).

The product of its digits is 36000, while the sum is 35.

The square root of 51526538 is about 7178.1987991417. The cubic root of 51526538 is about 372.1148381338.

The spelling of 51526538 in words is "fifty-one million, five hundred twenty-six thousand, five hundred thirty-eight".