22056191 has 12 divisors (see below), whose sum is σ = 23621808. Its totient is φ = 20589312.

The previous prime is 22056179. The next prime is 22056193. The reversal of 22056191 is 19165022.

It is not a de Polignac number, because 22056191 - 2⁶ = 22056127 is a prime.

It is a super-2 number, since 2×22056191² = 972951122856962, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22056191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22056193) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48035 + ... + 48491.

It is an arithmetic number, because the mean of its divisors is an integer number (1968484).

Almost surely, 2^22056191 is an apocalyptic number.

22056191 is a deficient number, since it is larger than the sum of its proper divisors (1565617).

22056191 is a wasteful number, since it uses less digits than its factorization.

22056191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658 (or 641 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 22056191 is about 4696.4019206197. The cubic root of 22056191 is about 280.4422899335.

The spelling of 22056191 in words is "twenty-two million, fifty-six thousand, one hundred ninety-one".