51157599 has 4 divisors (see below), whose sum is σ = 68210136. Its totient is φ = 34105064.

The previous prime is 51157591. The next prime is 51157609. The reversal of 51157599 is 99575115.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51157599 - 2³ = 51157591 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51157599.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51157591) 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, 8526264 + ... + 8526269.

It is an arithmetic number, because the mean of its divisors is an integer number (17052534).

Almost surely, 2^51157599 is an apocalyptic number.

51157599 is a deficient number, since it is larger than the sum of its proper divisors (17052537).

51157599 is a wasteful number, since it uses less digits than its factorization.

51157599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17052536.

The product of its digits is 70875, while the sum is 42.

The square root of 51157599 is about 7152.4540543788. The cubic root of 51157599 is about 371.2245742090.

The spelling of 51157599 in words is "fifty-one million, one hundred fifty-seven thousand, five hundred ninety-nine".