51856127 has 4 divisors (see below), whose sum is σ = 52369656. Its totient is φ = 51342600.

The previous prime is 51856109. The next prime is 51856157. The reversal of 51856127 is 72165815.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72165815 = 5 ⋅14433163.

It is a cyclic number.

It is not a de Polignac number, because 51856127 - 2⁸ = 51855871 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 (51856157) 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, 256613 + ... + 256814.

It is an arithmetic number, because the mean of its divisors is an integer number (13092414).

Almost surely, 2^51856127 is an apocalyptic number.

51856127 is a deficient number, since it is larger than the sum of its proper divisors (513529).

51856127 is a wasteful number, since it uses less digits than its factorization.

51856127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513528.

The product of its digits is 16800, while the sum is 35.

The square root of 51856127 is about 7201.1198434688. The cubic root of 51856127 is about 372.9065620904.

The spelling of 51856127 in words is "fifty-one million, eight hundred fifty-six thousand, one hundred twenty-seven".