22138142 has 16 divisors (see below), whose sum is σ = 35858592. Its totient is φ = 10189920.

The previous prime is 22138141. The next prime is 22138147. The reversal of 22138142 is 24183122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22138141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11063 + ... + 12909.

It is an arithmetic number, because the mean of its divisors is an integer number (2241162).

Almost surely, 2^22138142 is an apocalyptic number.

22138142 is a deficient number, since it is larger than the sum of its proper divisors (13720450).

22138142 is a wasteful number, since it uses less digits than its factorization.

22138142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2323.

The product of its digits is 768, while the sum is 23.

The square root of 22138142 is about 4705.1187020095. The cubic root of 22138142 is about 280.7891935977.

The spelling of 22138142 in words is "twenty-two million, one hundred thirty-eight thousand, one hundred forty-two".