22120056 has 48 divisors (see below), whose sum is σ = 68468400. Its totient is φ = 6319872.

The previous prime is 22120031. The next prime is 22120057. The reversal of 22120056 is 65002122.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22120057) 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 11 ways as a sum of consecutive naturals, for example, 21441 + ... + 22448.

It is an arithmetic number, because the mean of its divisors is an integer number (1426425).

Almost surely, 2^22120056 is an apocalyptic number.

It is an amenable number.

22120056 is an abundant number, since it is smaller than the sum of its proper divisors (46348344).

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

22120056 is a wasteful number, since it uses less digits than its factorization.

22120056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43908 (or 43901 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 22120056 is about 4703.1963599237. The cubic root of 22120056 is about 280.7127081528.

Adding to 22120056 its reverse (65002122), we get a palindrome (87122178).

The spelling of 22120056 in words is "twenty-two million, one hundred twenty thousand, fifty-six".