51757117 has 4 divisors (see below), whose sum is σ = 53155996. Its totient is φ = 50358240.

The previous prime is 51757103. The next prime is 51757127. The reversal of 51757117 is 71175715.

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 46049796 + 5707321 = 6786^2 + 2389^2 .

It is a cyclic number.

It is not a de Polignac number, because 51757117 - 2¹⁵ = 51724349 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 (51757127) 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, 699384 + ... + 699457.

It is an arithmetic number, because the mean of its divisors is an integer number (13288999).

Almost surely, 2^51757117 is an apocalyptic number.

It is an amenable number.

51757117 is a deficient number, since it is larger than the sum of its proper divisors (1398879).

51757117 is a wasteful number, since it uses less digits than its factorization.

51757117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398878.

The product of its digits is 8575, while the sum is 34.

The square root of 51757117 is about 7194.2419336578. The cubic root of 51757117 is about 372.6690780866.

The spelling of 51757117 in words is "fifty-one million, seven hundred fifty-seven thousand, one hundred seventeen".