56217730 has 16 divisors (see below), whose sum is σ = 101352384. Its totient is φ = 22451440.

The previous prime is 56217719. The next prime is 56217767. The reversal of 56217730 is 3771265.

It is a junction number, because it is equal to n+sod(n) for n = 56217692 and 56217701.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2715 + ... + 10945.

It is an arithmetic number, because the mean of its divisors is an integer number (6334524).

Almost surely, 2^56217730 is an apocalyptic number.

56217730 is a deficient number, since it is larger than the sum of its proper divisors (45134654).

56217730 is a wasteful number, since it uses less digits than its factorization.

56217730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8921.

The product of its (nonzero) digits is 8820, while the sum is 31.

The square root of 56217730 is about 7497.8483580291. The cubic root of 56217730 is about 383.0814316463.

Adding to 56217730 its reverse (3771265), we get a palindrome (59988995).

The spelling of 56217730 in words is "fifty-six million, two hundred seventeen thousand, seven hundred thirty".