56217770 has 64 divisors (see below), whose sum is σ = 124692480. Its totient is φ = 17817408.

The previous prime is 56217767. The next prime is 56217779. The reversal of 56217770 is 7771265.

56217770 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 56217770.

It is not an unprimeable number, because it can be changed into a prime (56217779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56699 + ... + 57681.

It is an arithmetic number, because the mean of its divisors is an integer number (1948320).

Almost surely, 2^56217770 is an apocalyptic number.

56217770 is an abundant number, since it is smaller than the sum of its proper divisors (68474710).

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

56217770 is a wasteful number, since it uses less digits than its factorization.

56217770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059.

The product of its (nonzero) digits is 20580, while the sum is 35.

The square root of 56217770 is about 7497.8510254606. The cubic root of 56217770 is about 383.0815225029.

The spelling of 56217770 in words is "fifty-six million, two hundred seventeen thousand, seven hundred seventy".