22142142 has 24 divisors (see below), whose sum is σ = 52336440. Its totient is φ = 6709680.

The previous prime is 22142117. The next prime is 22142147. The reversal of 22142142 is 24124122.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22142147) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55717 + ... + 56112.

It is an arithmetic number, because the mean of its divisors is an integer number (2180685).

Almost surely, 2^22142142 is an apocalyptic number.

22142142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

22142142 is an abundant number, since it is smaller than the sum of its proper divisors (30194298).

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

22142142 is a wasteful number, since it uses less digits than its factorization.

22142142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111848 (or 111845 counting only the distinct ones).

The product of its digits is 256, while the sum is 18.

The square root of 22142142 is about 4705.5437517889. The cubic root of 22142142 is about 280.8061039168.

Adding to 22142142 its reverse (24124122), we get a palindrome (46266264).

It can be divided in two parts, 2214 and 2142, that added together give a square (4356 = 66²).

The spelling of 22142142 in words is "twenty-two million, one hundred forty-two thousand, one hundred forty-two".