51587199 has 12 divisors (see below), whose sum is σ = 77275016. Its totient is φ = 34391304.

The previous prime is 51587189. The next prime is 51587203. The reversal of 51587199 is 99178515.

51587199 is a `hidden beast` number, since 51 + 587 + 19 + 9 = 666.

It is not a de Polignac number, because 51587199 - 2⁸ = 51586943 is a prime.

It is a super-2 number, since 2×51587199² = 5322478201331202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51587189) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105904 + ... + 106389.

Almost surely, 2^51587199 is an apocalyptic number.

51587199 is a deficient number, since it is larger than the sum of its proper divisors (25687817).

51587199 is an equidigital number, since it uses as much as digits as its factorization.

51587199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212308 (or 212296 counting only the distinct ones).

The product of its digits is 113400, while the sum is 45.

The square root of 51587199 is about 7182.4229198788. The cubic root of 51587199 is about 372.2608082603.

The spelling of 51587199 in words is "fifty-one million, five hundred eighty-seven thousand, one hundred ninety-nine".