51508579 has 2 divisors, whose sum is σ = 51508580. Its totient is φ = 51508578.

The previous prime is 51508571. The next prime is 51508603. The reversal of 51508579 is 97580515.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51508579 - 2³ = 51508571 is a prime.

It is not a weakly prime, because it can be changed into another prime (51508571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25754289 + 25754290.

It is an arithmetic number, because the mean of its divisors is an integer number (25754290).

Almost surely, 2^51508579 is an apocalyptic number.

51508579 is a deficient number, since it is larger than the sum of its proper divisors (1).

51508579 is an equidigital number, since it uses as much as digits as its factorization.

51508579 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63000, while the sum is 40.

The square root of 51508579 is about 7176.9477495660. The cubic root of 51508579 is about 372.0716009516.

The spelling of 51508579 in words is "fifty-one million, five hundred eight thousand, five hundred seventy-nine".