133043321 has 2 divisors, whose sum is σ = 133043322. Its totient is φ = 133043320.

The previous prime is 133043299. The next prime is 133043381. The reversal of 133043321 is 123340331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88153321 + 44890000 = 9389^2 + 6700^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133043321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 133043293 and 133043302.

It is not a weakly prime, because it can be changed into another prime (133043381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66521660 + 66521661.

It is an arithmetic number, because the mean of its divisors is an integer number (66521661).

Almost surely, 2^133043321 is an apocalyptic number.

It is an amenable number.

133043321 is a deficient number, since it is larger than the sum of its proper divisors (1).

133043321 is an equidigital number, since it uses as much as digits as its factorization.

133043321 is an evil number, because the sum of its binary digits is even.

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

The square root of 133043321 is about 11534.4406453022. The cubic root of 133043321 is about 510.5022874094.

Adding to 133043321 its reverse (123340331), we get a palindrome (256383652).

The spelling of 133043321 in words is "one hundred thirty-three million, forty-three thousand, three hundred twenty-one".