56220655 has 4 divisors (see below), whose sum is σ = 67464792. Its totient is φ = 44976520.

The previous prime is 56220643. The next prime is 56220673. The reversal of 56220655 is 55602265.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 56220655 - 2⁵ = 56220623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5622061 + ... + 5622070.

It is an arithmetic number, because the mean of its divisors is an integer number (16866198).

Almost surely, 2^56220655 is an apocalyptic number.

56220655 is a deficient number, since it is larger than the sum of its proper divisors (11244137).

56220655 is a wasteful number, since it uses less digits than its factorization.

56220655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11244136.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 56220655 is about 7498.0434114507. The cubic root of 56220655 is about 383.0880754208.

The spelling of 56220655 in words is "fifty-six million, two hundred twenty thousand, six hundred fifty-five".