56556216 has 24 divisors (see below), whose sum is σ = 153173280. Its totient is φ = 18852048.

The previous prime is 56556209. The next prime is 56556233. The reversal of 56556216 is 61265565.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 392680 + ... + 392823.

It is an arithmetic number, because the mean of its divisors is an integer number (6382220).

Almost surely, 2^56556216 is an apocalyptic number.

It is an amenable number.

56556216 is an abundant number, since it is smaller than the sum of its proper divisors (96617064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56556216 is a wasteful number, since it uses less digits than its factorization.

56556216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785515 (or 785508 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 56556216 is about 7520.3866921854. The cubic root of 56556216 is about 383.8487359953.

The spelling of 56556216 in words is "fifty-six million, five hundred fifty-six thousand, two hundred sixteen".