56152521 has 20 divisors (see below), whose sum is σ = 84456064. Its totient is φ = 37179000.

The previous prime is 56152519. The next prime is 56152529. The reversal of 56152521 is 12525165.

56152521 is a `hidden beast` number, since 5 + 615 + 25 + 21 = 666.

56152521 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 56152521 - 2¹ = 56152519 is a prime.

It is a super-2 number, since 2×56152521² = 6306211229310882, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56152529) 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 19 ways as a sum of consecutive naturals, for example, 9936 + ... + 14526.

Almost surely, 2^56152521 is an apocalyptic number.

It is an amenable number.

56152521 is a deficient number, since it is larger than the sum of its proper divisors (28303543).

56152521 is a wasteful number, since it uses less digits than its factorization.

56152521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4754 (or 4745 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 56152521 is about 7493.4985821044. The cubic root of 56152521 is about 382.9332576222.

Adding to 56152521 its reverse (12525165), we get a palindrome (68677686).

The spelling of 56152521 in words is "fifty-six million, one hundred fifty-two thousand, five hundred twenty-one".