22422156 has 12 divisors (see below), whose sum is σ = 52318392. Its totient is φ = 7474048.

The previous prime is 22422143. The next prime is 22422157. The reversal of 22422156 is 65122422.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (22422157) 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, 934245 + ... + 934268.

It is an arithmetic number, because the mean of its divisors is an integer number (4359866).

Almost surely, 2^22422156 is an apocalyptic number.

It is an amenable number.

22422156 is an abundant number, since it is smaller than the sum of its proper divisors (29896236).

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

22422156 is a wasteful number, since it uses less digits than its factorization.

22422156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1868520 (or 1868518 counting only the distinct ones).

The product of its digits is 1920, while the sum is 24.

The square root of 22422156 is about 4735.2039026847. The cubic root of 22422156 is about 281.9848591036.

Adding to 22422156 its reverse (65122422), we get a palindrome (87544578).

It can be divided in two parts, 22422 and 156, that added together give a triangular number (22578 = T₂₁₂).

The spelling of 22422156 in words is "twenty-two million, four hundred twenty-two thousand, one hundred fifty-six".