51157707 has 4 divisors (see below), whose sum is σ = 68210280. Its totient is φ = 34105136.

The previous prime is 51157697. The next prime is 51157739. The reversal of 51157707 is 70775115.

51157707 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 51157707 - 2²⁰ = 50109131 is a prime.

It is a super-2 number, since 2×51157707² = 5234221970995698, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51157787) 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 3 ways as a sum of consecutive naturals, for example, 8526282 + ... + 8526287.

It is an arithmetic number, because the mean of its divisors is an integer number (17052570).

Almost surely, 2^51157707 is an apocalyptic number.

51157707 is a deficient number, since it is larger than the sum of its proper divisors (17052573).

51157707 is a wasteful number, since it uses less digits than its factorization.

51157707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17052572.

The product of its (nonzero) digits is 8575, while the sum is 33.

The square root of 51157707 is about 7152.4616042311. The cubic root of 51157707 is about 371.2248354424.

The spelling of 51157707 in words is "fifty-one million, one hundred fifty-seven thousand, seven hundred seven".