22312331 has 2 divisors, whose sum is σ = 22312332. Its totient is φ = 22312330.

The previous prime is 22312321. The next prime is 22312333. The reversal of 22312331 is 13321322.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22312331 - 2²² = 18118027 is a prime.

It is a super-3 number, since 3×22312331³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

Together with 22312333, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22312333) 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 as a sum of consecutive naturals, namely, 11156165 + 11156166.

It is an arithmetic number, because the mean of its divisors is an integer number (11156166).

Almost surely, 2^22312331 is an apocalyptic number.

22312331 is a deficient number, since it is larger than the sum of its proper divisors (1).

22312331 is an equidigital number, since it uses as much as digits as its factorization.

22312331 is an odious number, because the sum of its binary digits is odd.

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

The square root of 22312331 is about 4723.5930180319. The cubic root of 22312331 is about 281.5237127296.

Adding to 22312331 its reverse (13321322), we get a palindrome (35633653).

The spelling of 22312331 in words is "twenty-two million, three hundred twelve thousand, three hundred thirty-one".