22056221 has 16 divisors (see below), whose sum is σ = 25214976. Its totient is φ = 19110000.

The previous prime is 22056193. The next prime is 22056239. The reversal of 22056221 is 12265022.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22056221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22056193 and 22056202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22056271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23756 + ... + 24666.

It is an arithmetic number, because the mean of its divisors is an integer number (1575936).

Almost surely, 2^22056221 is an apocalyptic number.

It is an amenable number.

22056221 is a deficient number, since it is larger than the sum of its proper divisors (3158755).

22056221 is a wasteful number, since it uses less digits than its factorization.

22056221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 22056221 is about 4696.4051145530. The cubic root of 22056221 is about 280.4424170824.

The spelling of 22056221 in words is "twenty-two million, fifty-six thousand, two hundred twenty-one".