133232321 has 2 divisors, whose sum is σ = 133232322. Its totient is φ = 133232320.

The previous prime is 133232303. The next prime is 133232387. The reversal of 133232321 is 123232331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131423296 + 1809025 = 11464^2 + 1345^2 .

It is a cyclic number.

It is not a de Polignac number, because 133232321 - 2⁶ = 133232257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 133232293 and 133232302.

It is not a weakly prime, because it can be changed into another prime (133232521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66616160 + 66616161.

It is an arithmetic number, because the mean of its divisors is an integer number (66616161).

Almost surely, 2^133232321 is an apocalyptic number.

It is an amenable number.

133232321 is a deficient number, since it is larger than the sum of its proper divisors (1).

133232321 is an equidigital number, since it uses as much as digits as its factorization.

133232321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 20.

The square root of 133232321 is about 11542.6305927202. The cubic root of 133232321 is about 510.7439111630.

Adding to 133232321 its reverse (123232331), we get a palindrome (256464652).

The spelling of 133232321 in words is "one hundred thirty-three million, two hundred thirty-two thousand, three hundred twenty-one".