56221677 has 12 divisors (see below), whose sum is σ = 81660124. Its totient is φ = 37272960.

The previous prime is 56221673. The next prime is 56221699. The reversal of 56221677 is 77612265.

56221677 is a `hidden beast` number, since 562 + 21 + 6 + 77 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 21399876 + 34821801 = 4626^2 + 5901^2 .

It is not a de Polignac number, because 56221677 - 2² = 56221673 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 (56221673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15628 + ... + 18885.

Almost surely, 2^56221677 is an apocalyptic number.

It is an amenable number.

56221677 is a deficient number, since it is larger than the sum of its proper divisors (25438447).

56221677 is a wasteful number, since it uses less digits than its factorization.

56221677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34700 (or 34697 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 56221677 is about 7498.1115622535. Note that the first 3 decimals coincide. The cubic root of 56221677 is about 383.0903967126.

The spelling of 56221677 in words is "fifty-six million, two hundred twenty-one thousand, six hundred seventy-seven".