133351313 has 4 divisors (see below), whose sum is σ = 133389168. Its totient is φ = 133313460.

The previous prime is 133351303. The next prime is 133351321. The reversal of 133351313 is 313153331.

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, and also an emirpimes, since its reverse is a distinct semiprime: 313153331 = 401 ⋅780931.

It is a cyclic number.

It is not a de Polignac number, because 133351313 - 2⁴ = 133351297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (133351303) 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, 13031 + ... + 20892.

It is an arithmetic number, because the mean of its divisors is an integer number (33347292).

Almost surely, 2^133351313 is an apocalyptic number.

It is an amenable number.

133351313 is a deficient number, since it is larger than the sum of its proper divisors (37855).

133351313 is an equidigital number, since it uses as much as digits as its factorization.

133351313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37854.

The product of its digits is 1215, while the sum is 23.

The square root of 133351313 is about 11547.7838999524. The cubic root of 133351313 is about 510.8959172105.

The spelling of 133351313 in words is "one hundred thirty-three million, three hundred fifty-one thousand, three hundred thirteen".