51700717 has 4 divisors (see below), whose sum is σ = 52409020. Its totient is φ = 50992416.

The previous prime is 51700703. The next prime is 51700741. The reversal of 51700717 is 71700715.

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 31933801 + 19766916 = 5651^2 + 4446^2 .

It is a cyclic number.

It is not a de Polignac number, because 51700717 - 2¹⁵ = 51667949 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 (51700217) 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, 354042 + ... + 354187.

It is an arithmetic number, because the mean of its divisors is an integer number (13102255).

Almost surely, 2^51700717 is an apocalyptic number.

It is an amenable number.

51700717 is a deficient number, since it is larger than the sum of its proper divisors (708303).

51700717 is an equidigital number, since it uses as much as digits as its factorization.

51700717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708302.

The product of its (nonzero) digits is 1715, while the sum is 28.

The square root of 51700717 is about 7190.3210637634. The cubic root of 51700717 is about 372.5336624084.

The spelling of 51700717 in words is "fifty-one million, seven hundred thousand, seven hundred seventeen".