56799521 has 4 divisors (see below), whose sum is σ = 56844612. Its totient is φ = 56754432.

The previous prime is 56799511. The next prime is 56799527. The reversal of 56799521 is 12599765.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12599765 = 5 ⋅2519953.

It can be written as a sum of positive squares in 2 ways, for example, as 55726225 + 1073296 = 7465^2 + 1036^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56799521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56799527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20600 + ... + 23193.

It is an arithmetic number, because the mean of its divisors is an integer number (14211153).

Almost surely, 2^56799521 is an apocalyptic number.

It is an amenable number.

56799521 is a deficient number, since it is larger than the sum of its proper divisors (45091).

56799521 is a wasteful number, since it uses less digits than its factorization.

56799521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45090.

The product of its digits is 170100, while the sum is 44.

The square root of 56799521 is about 7536.5456941493. The cubic root of 56799521 is about 384.3983879924.

The spelling of 56799521 in words is "fifty-six million, seven hundred ninety-nine thousand, five hundred twenty-one".