22143131 has 4 divisors (see below), whose sum is σ = 22741632. Its totient is φ = 21544632.

The previous prime is 22143127. The next prime is 22143133. The reversal of 22143131 is 13134122.

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

It is a cyclic number.

It is not a de Polignac number, because 22143131 - 2² = 22143127 is a prime.

It is a super-2 number, since 2×22143131² = 980636500966322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22143133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299195 + ... + 299268.

It is an arithmetic number, because the mean of its divisors is an integer number (5685408).

Almost surely, 2^22143131 is an apocalyptic number.

22143131 is a deficient number, since it is larger than the sum of its proper divisors (598501).

22143131 is an equidigital number, since it uses as much as digits as its factorization.

22143131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598500.

The product of its digits is 144, while the sum is 17.

The square root of 22143131 is about 4705.6488394269. The cubic root of 22143131 is about 280.8102846792.

Adding to 22143131 its reverse (13134122), we get a palindrome (35277253).

Subtracting from 22143131 its reverse (13134122), we obtain a palindrome (9009009).

The spelling of 22143131 in words is "twenty-two million, one hundred forty-three thousand, one hundred thirty-one".