22055772 has 12 divisors (see below), whose sum is σ = 51463496. Its totient is φ = 7351920.

The previous prime is 22055771. The next prime is 22055777. The reversal of 22055772 is 27755022.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22055771) 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 3 ways as a sum of consecutive naturals, for example, 918979 + ... + 919002.

Almost surely, 2^22055772 is an apocalyptic number.

It is an amenable number.

22055772 is an abundant number, since it is smaller than the sum of its proper divisors (29407724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22055772 is a wasteful number, since it uses less digits than its factorization.

22055772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1837988 (or 1837986 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 30.

The square root of 22055772 is about 4696.3573117896. The cubic root of 22055772 is about 280.4405140744.

The spelling of 22055772 in words is "twenty-two million, fifty-five thousand, seven hundred seventy-two".