56257517 has 4 divisors (see below), whose sum is σ = 58703520. Its totient is φ = 53811516.

The previous prime is 56257511. The next prime is 56257547. The reversal of 56257517 is 71575265.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56257517 - 2¹⁰ = 56256493 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 (56257511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1222967 + ... + 1223012.

It is an arithmetic number, because the mean of its divisors is an integer number (14675880).

Almost surely, 2^56257517 is an apocalyptic number.

It is an amenable number.

56257517 is a deficient number, since it is larger than the sum of its proper divisors (2446003).

56257517 is a wasteful number, since it uses less digits than its factorization.

56257517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2446002.

The product of its digits is 73500, while the sum is 38.

The square root of 56257517 is about 7500.5011165921. The cubic root of 56257517 is about 383.1717831343.

The spelling of 56257517 in words is "fifty-six million, two hundred fifty-seven thousand, five hundred seventeen".