22133131 has 4 divisors (see below), whose sum is σ = 22213312. Its totient is φ = 22052952.

The previous prime is 22133129. The next prime is 22133173. The reversal of 22133131 is 13133122.

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 22133131 - 2¹ = 22133129 is a prime.

It is a super-2 number, since 2×22133131² = 979750975726322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22133191) 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 in 3 ways as a sum of consecutive naturals, for example, 39675 + ... + 40228.

It is an arithmetic number, because the mean of its divisors is an integer number (5553328).

Almost surely, 2^22133131 is an apocalyptic number.

22133131 is a deficient number, since it is larger than the sum of its proper divisors (80181).

22133131 is an equidigital number, since it uses as much as digits as its factorization.

22133131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80180.

The product of its digits is 108, while the sum is 16.

The square root of 22133131 is about 4704.5861667101. The cubic root of 22133131 is about 280.7680063210.

Adding to 22133131 its reverse (13133122), we get a palindrome (35266253).

Subtracting from 22133131 its reverse (13133122), we obtain a palindrome (9000009).

The spelling of 22133131 in words is "twenty-two million, one hundred thirty-three thousand, one hundred thirty-one".