56620219 has 2 divisors, whose sum is σ = 56620220. Its totient is φ = 56620218.

The previous prime is 56620211. The next prime is 56620243. The reversal of 56620219 is 91202665.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56620219 - 2³ = 56620211 is a prime.

It is a super-2 number, since 2×56620219² = 6411698399215922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56620211) by changing a digit.

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 as a sum of consecutive naturals, namely, 28310109 + 28310110.

It is an arithmetic number, because the mean of its divisors is an integer number (28310110).

Almost surely, 2^56620219 is an apocalyptic number.

56620219 is a deficient number, since it is larger than the sum of its proper divisors (1).

56620219 is an equidigital number, since it uses as much as digits as its factorization.

56620219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 56620219 is about 7524.6407887686. The cubic root of 56620219 is about 383.9934781698.

The spelling of 56620219 in words is "fifty-six million, six hundred twenty thousand, two hundred nineteen".