133253321 has 4 divisors (see below), whose sum is σ = 136503444. Its totient is φ = 130003200.

The previous prime is 133253311. The next prime is 133253333. The reversal of 133253321 is 123352331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24364096 + 108889225 = 4936^2 + 10435^2 .

It is a cyclic number.

It is not a de Polignac number, because 133253321 - 2⁶ = 133253257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133253311) 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, 1625000 + ... + 1625081.

It is an arithmetic number, because the mean of its divisors is an integer number (34125861).

Almost surely, 2^133253321 is an apocalyptic number.

It is an amenable number.

133253321 is a deficient number, since it is larger than the sum of its proper divisors (3250123).

133253321 is an equidigital number, since it uses as much as digits as its factorization.

133253321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3250122.

The product of its digits is 1620, while the sum is 23.

The square root of 133253321 is about 11543.5402281969. The cubic root of 133253321 is about 510.7707441381.

The spelling of 133253321 in words is "one hundred thirty-three million, two hundred fifty-three thousand, three hundred twenty-one".