51717813 has 32 divisors (see below), whose sum is σ = 81899520. Its totient is φ = 28416960.

The previous prime is 51717793. The next prime is 51717821. The reversal of 51717813 is 31871715.

51717813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51717813 - 2¹⁰ = 51716789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51717833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59778 + ... + 60636.

It is an arithmetic number, because the mean of its divisors is an integer number (2559360).

Almost surely, 2^51717813 is an apocalyptic number.

It is an amenable number.

51717813 is a deficient number, since it is larger than the sum of its proper divisors (30181707).

51717813 is a wasteful number, since it uses less digits than its factorization.

51717813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977.

The product of its digits is 5880, while the sum is 33.

The square root of 51717813 is about 7191.5097858516. The cubic root of 51717813 is about 372.5747200828.

The spelling of 51717813 in words is "fifty-one million, seven hundred seventeen thousand, eight hundred thirteen".