133504321 has 4 divisors (see below), whose sum is σ = 137810944. Its totient is φ = 129197700.

The previous prime is 133504307. The next prime is 133504331. The reversal of 133504321 is 123405331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 133504321 - 2⁵ = 133504289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133504292 and 133504301.

It is not an unprimeable number, because it can be changed into a prime (133504331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2153265 + ... + 2153326.

It is an arithmetic number, because the mean of its divisors is an integer number (34452736).

Almost surely, 2^133504321 is an apocalyptic number.

It is an amenable number.

133504321 is a deficient number, since it is larger than the sum of its proper divisors (4306623).

133504321 is an equidigital number, since it uses as much as digits as its factorization.

133504321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4306622.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 133504321 is about 11554.4069947358. The cubic root of 133504321 is about 511.0912440800.

Adding to 133504321 its reverse (123405331), we get a palindrome (256909652).

It can be divided in two parts, 13350 and 4321, that added together give a palindrome (17671).

The spelling of 133504321 in words is "one hundred thirty-three million, five hundred four thousand, three hundred twenty-one".