56217130 has 16 divisors (see below), whose sum is σ = 107143560. Its totient is φ = 21164032.

The previous prime is 56217127. The next prime is 56217131. The reversal of 56217130 is 3171265.

It can be written as a sum of positive squares in 4 ways, for example, as 55995289 + 221841 = 7483^2 + 471^2 .

It is a junction number, because it is equal to n+sod(n) for n = 56217095 and 56217104.

It is not an unprimeable number, because it can be changed into a prime (56217131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165175 + ... + 165514.

Almost surely, 2^56217130 is an apocalyptic number.

56217130 is a deficient number, since it is larger than the sum of its proper divisors (50926430).

56217130 is a wasteful number, since it uses less digits than its factorization.

56217130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330713.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 56217130 is about 7497.8083464436. The cubic root of 56217130 is about 383.0800687923.

Adding to 56217130 its reverse (3171265), we get a palindrome (59388395).

The spelling of 56217130 in words is "fifty-six million, two hundred seventeen thousand, one hundred thirty".