56319811 has 4 divisors (see below), whose sum is σ = 57032800. Its totient is φ = 55606824.

The previous prime is 56319799. The next prime is 56319817. The reversal of 56319811 is 11891365.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11891365 = 5 ⋅2378273.

It is a cyclic number.

It is not a de Polignac number, because 56319811 - 2⁹ = 56319299 is a prime.

It is a super-2 number, since 2×56319811² = 6343842222151442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56319817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356376 + ... + 356533.

It is an arithmetic number, because the mean of its divisors is an integer number (14258200).

Almost surely, 2^56319811 is an apocalyptic number.

56319811 is a deficient number, since it is larger than the sum of its proper divisors (712989).

56319811 is an equidigital number, since it uses as much as digits as its factorization.

56319811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712988.

The product of its digits is 6480, while the sum is 34.

The square root of 56319811 is about 7504.6526235396. The cubic root of 56319811 is about 383.3131597869.

The spelling of 56319811 in words is "fifty-six million, three hundred nineteen thousand, eight hundred eleven".