22122156 has 96 divisors (see below), whose sum is σ = 63221760. Its totient is φ = 5880384.

The previous prime is 22122103. The next prime is 22122169. The reversal of 22122156 is 65122122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 132385 + ... + 132551.

It is an arithmetic number, because the mean of its divisors is an integer number (658560).

Almost surely, 2^22122156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22122156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31610880).

22122156 is an abundant number, since it is smaller than the sum of its proper divisors (41099604).

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

22122156 is a wasteful number, since it uses less digits than its factorization.

22122156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283 (or 281 counting only the distinct ones).

The product of its digits is 480, while the sum is 21.

The square root of 22122156 is about 4703.4196070519. The cubic root of 22122156 is about 280.7215911627.

Adding to 22122156 its reverse (65122122), we get a palindrome (87244278).

The spelling of 22122156 in words is "twenty-two million, one hundred twenty-two thousand, one hundred fifty-six".