22321331 has 2 divisors, whose sum is σ = 22321332. Its totient is φ = 22321330.

The previous prime is 22321319. The next prime is 22321337. The reversal of 22321331 is 13312322.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22321331 - 2⁶ = 22321267 is a prime.

It is a super-3 number, since 3×22321331³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (22321337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11160665 + 11160666.

It is an arithmetic number, because the mean of its divisors is an integer number (11160666).

Almost surely, 2^22321331 is an apocalyptic number.

22321331 is a deficient number, since it is larger than the sum of its proper divisors (1).

22321331 is an equidigital number, since it uses as much as digits as its factorization.

22321331 is an evil number, because the sum of its binary digits is even.

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

The square root of 22321331 is about 4724.5455866147. The cubic root of 22321331 is about 281.5615598557.

Adding to 22321331 its reverse (13312322), we get a palindrome (35633653).

Subtracting from 22321331 its reverse (13312322), we obtain a palindrome (9009009).

It can be divided in two parts, 2232 and 1331, that multiplied together give a palindrome (2970792).

The spelling of 22321331 in words is "twenty-two million, three hundred twenty-one thousand, three hundred thirty-one".