56228661 has 20 divisors (see below), whose sum is σ = 84239232. Its totient is φ = 37377288.

The previous prime is 56228659. The next prime is 56228693. The reversal of 56228661 is 16682265.

It is not a de Polignac number, because 56228661 - 2¹ = 56228659 is a prime.

It is a super-3 number, since 3×56228661³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56228561) 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 19 ways as a sum of consecutive naturals, for example, 35100 + ... + 36666.

Almost surely, 2^56228661 is an apocalyptic number.

It is an amenable number.

56228661 is a deficient number, since it is larger than the sum of its proper divisors (28010571).

56228661 is a wasteful number, since it uses less digits than its factorization.

56228661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2022 (or 2013 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 56228661 is about 7498.5772650550. The cubic root of 56228661 is about 383.1062588776.

The spelling of 56228661 in words is "fifty-six million, two hundred twenty-eight thousand, six hundred sixty-one".