56311019 has 2 divisors, whose sum is σ = 56311020. Its totient is φ = 56311018.

The previous prime is 56311007. The next prime is 56311039. The reversal of 56311019 is 91011365.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56311019 - 2¹² = 56306923 is a prime.

It is a super-2 number, since 2×56311019² = 6341861721636722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56311039) 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, 28155509 + 28155510.

It is an arithmetic number, because the mean of its divisors is an integer number (28155510).

Almost surely, 2^56311019 is an apocalyptic number.

56311019 is a deficient number, since it is larger than the sum of its proper divisors (1).

56311019 is an equidigital number, since it uses as much as digits as its factorization.

56311019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 56311019 is about 7504.0668307259. The cubic root of 56311019 is about 383.2932126042.

The spelling of 56311019 in words is "fifty-six million, three hundred eleven thousand, nineteen".