22142345 has 4 divisors (see below), whose sum is σ = 26570820. Its totient is φ = 17713872.

The previous prime is 22142333. The next prime is 22142359. The reversal of 22142345 is 54324122.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15241216 + 6901129 = 3904^2 + 2627^2 .

It is a cyclic number.

It is not a de Polignac number, because 22142345 - 2⁸ = 22142089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22142345.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2214230 + ... + 2214239.

It is an arithmetic number, because the mean of its divisors is an integer number (6642705).

Almost surely, 2^22142345 is an apocalyptic number.

It is an amenable number.

22142345 is a deficient number, since it is larger than the sum of its proper divisors (4428475).

22142345 is an equidigital number, since it uses as much as digits as its factorization.

22142345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4428474.

The product of its digits is 1920, while the sum is 23.

The square root of 22142345 is about 4705.5653220416. The cubic root of 22142345 is about 280.8069620612.

Adding to 22142345 its reverse (54324122), we get a palindrome (76466467).

The spelling of 22142345 in words is "twenty-two million, one hundred forty-two thousand, three hundred forty-five".