51157715 has 12 divisors (see below), whose sum is σ = 71412336. Its totient is φ = 35079408.

The previous prime is 51157697. The next prime is 51157739. The reversal of 51157715 is 51775115.

It is a happy number.

51157715 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51157715 - 2⁸ = 51157459 is a prime.

It is a super-2 number, since 2×51157715² = 5234223608042450, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a Duffinian number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 104159 + ... + 104648.

It is an arithmetic number, because the mean of its divisors is an integer number (5951028).

Almost surely, 2^51157715 is an apocalyptic number.

51157715 is a deficient number, since it is larger than the sum of its proper divisors (20254621).

51157715 is a wasteful number, since it uses less digits than its factorization.

51157715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208826 (or 208819 counting only the distinct ones).

The product of its digits is 6125, while the sum is 32.

The square root of 51157715 is about 7152.4621634791. The cubic root of 51157715 is about 371.2248547930.

The spelling of 51157715 in words is "fifty-one million, one hundred fifty-seven thousand, seven hundred fifteen".