56422021 has 4 divisors (see below), whose sum is σ = 56493612. Its totient is φ = 56350432.

The previous prime is 56422019. The next prime is 56422049. The reversal of 56422021 is 12022465.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11464996 + 44957025 = 3386^2 + 6705^2 .

It is a cyclic number.

It is not a de Polignac number, because 56422021 - 2¹ = 56422019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56421983 and 56422001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56422721) 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, 34600 + ... + 36193.

It is an arithmetic number, because the mean of its divisors is an integer number (14123403).

Almost surely, 2^56422021 is an apocalyptic number.

It is an amenable number.

56422021 is a deficient number, since it is larger than the sum of its proper divisors (71591).

56422021 is an equidigital number, since it uses as much as digits as its factorization.

56422021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71590.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 56422021 is about 7511.4593122775. The cubic root of 56422021 is about 383.5449003929.

Adding to 56422021 its reverse (12022465), we get a palindrome (68444486).

The spelling of 56422021 in words is "fifty-six million, four hundred twenty-two thousand, twenty-one".