22158120 has 32 divisors (see below), whose sum is σ = 66474720. Its totient is φ = 5908800.

The previous prime is 22158119. The next prime is 22158121. The reversal of 22158120 is 2185122.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22158119) and next prime (22158121).

It is not an unprimeable number, because it can be changed into a prime (22158121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92206 + ... + 92445.

It is an arithmetic number, because the mean of its divisors is an integer number (2077335).

Almost surely, 2^22158120 is an apocalyptic number.

22158120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22158120 is an abundant number, since it is smaller than the sum of its proper divisors (44316600).

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

22158120 is a wasteful number, since it uses less digits than its factorization.

22158120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184665 (or 184661 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 22158120 is about 4707.2412302749. The cubic root of 22158120 is about 280.8736318783.

The spelling of 22158120 in words is "twenty-two million, one hundred fifty-eight thousand, one hundred twenty".