232221331 has 2 divisors, whose sum is σ = 232221332. Its totient is φ = 232221330.

The previous prime is 232221329. The next prime is 232221359. The reversal of 232221331 is 133122232.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 232221331 - 2¹ = 232221329 is a prime.

It is a super-2 number, since 2×232221331² = 107853493142823122, which contains 22 as substring.

Together with 232221329, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 232221299 and 232221308.

It is not a weakly prime, because it can be changed into another prime (232221391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116110665 + 116110666.

It is an arithmetic number, because the mean of its divisors is an integer number (116110666).

Almost surely, 2^232221331 is an apocalyptic number.

232221331 is a deficient number, since it is larger than the sum of its proper divisors (1).

232221331 is an equidigital number, since it uses as much as digits as its factorization.

232221331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 19.

The square root of 232221331 is about 15238.8100257205. The cubic root of 232221331 is about 614.6587050301.

Adding to 232221331 its reverse (133122232), we get a palindrome (365343563).

Subtracting from 232221331 its reverse (133122232), we obtain a palindrome (99099099).

It can be divided in two parts, 2322 and 21331, that added together give a triangular number (23653 = T₂₁₇).

The spelling of 232221331 in words is "two hundred thirty-two million, two hundred twenty-one thousand, three hundred thirty-one".