51717717 has 8 divisors (see below), whose sum is σ = 76618880. Its totient is φ = 34478460.

The previous prime is 51717713. The next prime is 51717761. The reversal of 51717717 is 71771715.

It is not a de Polignac number, because 51717717 - 2² = 51717713 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 (51717713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 957709 + ... + 957762.

It is an arithmetic number, because the mean of its divisors is an integer number (9577360).

Almost surely, 2^51717717 is an apocalyptic number.

It is an amenable number.

51717717 is a deficient number, since it is larger than the sum of its proper divisors (24901163).

51717717 is a wasteful number, since it uses less digits than its factorization.

51717717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1915480 (or 1915474 counting only the distinct ones).

The product of its digits is 12005, while the sum is 36.

The square root of 51717717 is about 7191.5031113113. The cubic root of 51717717 is about 372.5744895549.

The spelling of 51717717 in words is "fifty-one million, seven hundred seventeen thousand, seven hundred seventeen".