22131331 has 6 divisors (see below), whose sum is σ = 23510060. Its totient is φ = 20829216.

The previous prime is 22131289. The next prime is 22131397. The reversal of 22131331 is 13313122.

It is not a de Polignac number, because 22131331 - 2⁹ = 22130819 is a prime.

It is a super-2 number, since 2×22131331² = 979591623663122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22131631) 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 5 ways as a sum of consecutive naturals, for example, 38001 + ... + 38578.

Almost surely, 2^22131331 is an apocalyptic number.

22131331 is a deficient number, since it is larger than the sum of its proper divisors (1378729).

22131331 is an equidigital number, since it uses as much as digits as its factorization.

22131331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76613 (or 76596 counting only the distinct ones).

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

The square root of 22131331 is about 4704.3948601281. The cubic root of 22131331 is about 280.7603948641.

Adding to 22131331 its reverse (13313122), we get a palindrome (35444453).

The spelling of 22131331 in words is "twenty-two million, one hundred thirty-one thousand, three hundred thirty-one".