51157199 has 8 divisors (see below), whose sum is σ = 55631088. Its totient is φ = 46846080.

The previous prime is 51157193. The next prime is 51157219. The reversal of 51157199 is 99175115.

51157199 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51157199 - 2¹² = 51153103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51157193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40037 + ... + 41294.

It is an arithmetic number, because the mean of its divisors is an integer number (6953886).

Almost surely, 2^51157199 is an apocalyptic number.

51157199 is a deficient number, since it is larger than the sum of its proper divisors (4473889).

51157199 is a wasteful number, since it uses less digits than its factorization.

51157199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81385.

The product of its digits is 14175, while the sum is 38.

The square root of 51157199 is about 7152.4260918936. The cubic root of 51157199 is about 371.2236066746.

The spelling of 51157199 in words is "fifty-one million, one hundred fifty-seven thousand, one hundred ninety-nine".