51299717 has 6 divisors (see below), whose sum is σ = 59675238. Its totient is φ = 43971144.

The previous prime is 51299713. The next prime is 51299737. The reversal of 51299717 is 71799215.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 50779876 + 519841 = 7126^2 + 721^2 .

It is not a de Polignac number, because 51299717 - 2² = 51299713 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51299713) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 523418 + ... + 523515.

It is an arithmetic number, because the mean of its divisors is an integer number (9945873).

Almost surely, 2^51299717 is an apocalyptic number.

It is an amenable number.

51299717 is a deficient number, since it is larger than the sum of its proper divisors (8375521).

51299717 is a wasteful number, since it uses less digits than its factorization.

51299717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1046947 (or 1046940 counting only the distinct ones).

The product of its digits is 39690, while the sum is 41.

The square root of 51299717 is about 7162.3820758181. The cubic root of 51299717 is about 371.5680156263.

The spelling of 51299717 in words is "fifty-one million, two hundred ninety-nine thousand, seven hundred seventeen".