56069821 has 4 divisors (see below), whose sum is σ = 56906752. Its totient is φ = 55232892.

The previous prime is 56069729. The next prime is 56069831. The reversal of 56069821 is 12896065.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56069821 - 2⁷ = 56069693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56069831) 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 in 3 ways as a sum of consecutive naturals, for example, 418365 + ... + 418498.

It is an arithmetic number, because the mean of its divisors is an integer number (14226688).

Almost surely, 2^56069821 is an apocalyptic number.

It is an amenable number.

56069821 is a deficient number, since it is larger than the sum of its proper divisors (836931).

56069821 is an equidigital number, since it uses as much as digits as its factorization.

56069821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836930.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 56069821 is about 7487.9784321271. The cubic root of 56069821 is about 382.7451738136.

The spelling of 56069821 in words is "fifty-six million, sixty-nine thousand, eight hundred twenty-one".