51807713 has 4 divisors (see below), whose sum is σ = 51839940. Its totient is φ = 51775488.

The previous prime is 51807703. The next prime is 51807731. The reversal of 51807713 is 31770815.

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 22344529 + 29463184 = 4727^2 + 5428^2 .

It is a cyclic number.

It is not a de Polignac number, because 51807713 - 2⁴ = 51807697 is a prime.

It is a deceptive number, since it divides R_51807712.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51807713.

It is not an unprimeable number, because it can be changed into a prime (51807703) 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, 13568 + ... + 16961.

It is an arithmetic number, because the mean of its divisors is an integer number (12959985).

Almost surely, 2^51807713 is an apocalyptic number.

It is an amenable number.

51807713 is a deficient number, since it is larger than the sum of its proper divisors (32227).

51807713 is a wasteful number, since it uses less digits than its factorization.

51807713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32226.

The product of its (nonzero) digits is 5880, while the sum is 32.

The square root of 51807713 is about 7197.7574979989. The cubic root of 51807713 is about 372.7904747493.

The spelling of 51807713 in words is "fifty-one million, eight hundred seven thousand, seven hundred thirteen".