22981142 has 4 divisors (see below), whose sum is σ = 34471716. Its totient is φ = 11490570.

The previous prime is 22981141. The next prime is 22981157. The reversal of 22981142 is 24118922.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22981141) 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 as a sum of consecutive naturals, namely, 5745284 + ... + 5745287.

It is an arithmetic number, because the mean of its divisors is an integer number (8617929).

Almost surely, 2^22981142 is an apocalyptic number.

22981142 is a deficient number, since it is larger than the sum of its proper divisors (11490574).

22981142 is a wasteful number, since it uses less digits than its factorization.

22981142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11490573.

The product of its digits is 2304, while the sum is 29.

The square root of 22981142 is about 4793.8650377331. The cubic root of 22981142 is about 284.3089526121.

The spelling of 22981142 in words is "twenty-two million, nine hundred eighty-one thousand, one hundred forty-two".