22143005 has 4 divisors (see below), whose sum is σ = 26571612. Its totient is φ = 17714400.

The previous prime is 22143001. The next prime is 22143013. The reversal of 22143005 is 50034122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50034122 = 2 ⋅25017061.

It can be written as a sum of positive squares in 2 ways, for example, as 16662724 + 5480281 = 4082^2 + 2341^2 .

It is not a de Polignac number, because 22143005 - 2² = 22143001 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22143001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2214296 + ... + 2214305.

It is an arithmetic number, because the mean of its divisors is an integer number (6642903).

Almost surely, 2^22143005 is an apocalyptic number.

It is an amenable number.

22143005 is a deficient number, since it is larger than the sum of its proper divisors (4428607).

22143005 is an equidigital number, since it uses as much as digits as its factorization.

22143005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4428606.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 22143005 is about 4705.6354512435. The cubic root of 22143005 is about 280.8097520510.

Adding to 22143005 its reverse (50034122), we get a palindrome (72177127).

The spelling of 22143005 in words is "twenty-two million, one hundred forty-three thousand, five".