51718427 has 4 divisors (see below), whose sum is σ = 51842280. Its totient is φ = 51594576.

The previous prime is 51718417. The next prime is 51718441. The reversal of 51718427 is 72481715.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72481715 = 5 ⋅14496343.

It is a cyclic number.

It is not a de Polignac number, because 51718427 - 2⁴ = 51718411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51718417) 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, 61298 + ... + 62135.

It is an arithmetic number, because the mean of its divisors is an integer number (12960570).

Almost surely, 2^51718427 is an apocalyptic number.

51718427 is a deficient number, since it is larger than the sum of its proper divisors (123853).

51718427 is a wasteful number, since it uses less digits than its factorization.

51718427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123852.

The product of its digits is 15680, while the sum is 35.

The square root of 51718427 is about 7191.5524749528. The cubic root of 51718427 is about 372.5761944941.

The spelling of 51718427 in words is "fifty-one million, seven hundred eighteen thousand, four hundred twenty-seven".