56221525 has 6 divisors (see below), whose sum is σ = 69714722. Its totient is φ = 44977200.

The previous prime is 56221519. The next prime is 56221531. The reversal of 56221525 is 52512265.

It is an interprime number because it is at equal distance from previous prime (56221519) and next prime (56221531).

It can be written as a sum of positive squares in 3 ways, for example, as 1521 + 56220004 = 39^2 + 7498^2 .

It is not a de Polignac number, because 56221525 - 2¹¹ = 56219477 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56221493 and 56221502.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 1124406 + ... + 1124455.

Almost surely, 2^56221525 is an apocalyptic number.

It is an amenable number.

56221525 is a deficient number, since it is larger than the sum of its proper divisors (13493197).

56221525 is a wasteful number, since it uses less digits than its factorization.

56221525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2248871 (or 2248866 counting only the distinct ones).

The product of its digits is 6000, while the sum is 28.

The square root of 56221525 is about 7498.1014263612. The cubic root of 56221525 is about 383.0900514733.

The spelling of 56221525 in words is "fifty-six million, two hundred twenty-one thousand, five hundred twenty-five".