22131233 has 4 divisors (see below), whose sum is σ = 22140720. Its totient is φ = 22121748.

The previous prime is 22131223. The next prime is 22131259. The reversal of 22131233 is 33213122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 33213122 = 2 ⋅16606561.

It is a cyclic number.

It is not a de Polignac number, because 22131233 - 2¹⁶ = 22065697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22131223) 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, 1466 + ... + 6812.

It is an arithmetic number, because the mean of its divisors is an integer number (5535180).

Almost surely, 2^22131233 is an apocalyptic number.

It is an amenable number.

22131233 is a deficient number, since it is larger than the sum of its proper divisors (9487).

22131233 is an equidigital number, since it uses as much as digits as its factorization.

22131233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9486.

The product of its digits is 216, while the sum is 17.

The square root of 22131233 is about 4704.3844443243. The cubic root of 22131233 is about 280.7599804508.

Adding to 22131233 its reverse (33213122), we get a palindrome (55344355).

The spelling of 22131233 in words is "twenty-two million, one hundred thirty-one thousand, two hundred thirty-three".