22091142 has 32 divisors (see below), whose sum is σ = 45453312. Its totient is φ = 7154784.

The previous prime is 22091141. The next prime is 22091159. The reversal of 22091142 is 24119022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22091141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40113 + ... + 40659.

It is an arithmetic number, because the mean of its divisors is an integer number (1420416).

Almost surely, 2^22091142 is an apocalyptic number.

22091142 is an abundant number, since it is smaller than the sum of its proper divisors (23362170).

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

22091142 is a wasteful number, since it uses less digits than its factorization.

22091142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 22091142 is about 4700.1214877916. The cubic root of 22091142 is about 280.5903445944.

The spelling of 22091142 in words is "twenty-two million, ninety-one thousand, one hundred forty-two".