51426517 has 4 divisors (see below), whose sum is σ = 51487660. Its totient is φ = 51365376.

The previous prime is 51426511. The next prime is 51426533. The reversal of 51426517 is 71562415.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1285956 + 50140561 = 1134^2 + 7081^2 .

It is a cyclic number.

It is not a de Polignac number, because 51426517 - 2²³ = 43037909 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 (51426511) 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, 29292 + ... + 30997.

It is an arithmetic number, because the mean of its divisors is an integer number (12871915).

Almost surely, 2^51426517 is an apocalyptic number.

It is an amenable number.

51426517 is a deficient number, since it is larger than the sum of its proper divisors (61143).

51426517 is an equidigital number, since it uses as much as digits as its factorization.

51426517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61142.

The product of its digits is 8400, while the sum is 31.

The square root of 51426517 is about 7171.2284163873. The cubic root of 51426517 is about 371.8739046363.

The spelling of 51426517 in words is "fifty-one million, four hundred twenty-six thousand, five hundred seventeen".