56219311 has 2 divisors, whose sum is σ = 56219312. Its totient is φ = 56219310.

The previous prime is 56219299. The next prime is 56219321. The reversal of 56219311 is 11391265.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56219311 - 2⁵ = 56219279 is a prime.

It is a super-2 number, since 2×56219311² = 6321221858629442, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56219311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56219321) by changing a digit.

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 as a sum of consecutive naturals, namely, 28109655 + 28109656.

It is an arithmetic number, because the mean of its divisors is an integer number (28109656).

Almost surely, 2^56219311 is an apocalyptic number.

56219311 is a deficient number, since it is larger than the sum of its proper divisors (1).

56219311 is an equidigital number, since it uses as much as digits as its factorization.

56219311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620, while the sum is 28.

The square root of 56219311 is about 7497.9537875343. The cubic root of 56219311 is about 383.0850227202.

The spelling of 56219311 in words is "fifty-six million, two hundred nineteen thousand, three hundred eleven".