133513233 has 16 divisors (see below), whose sum is σ = 204112896. Its totient is φ = 76044240.

The previous prime is 133513217. The next prime is 133513241. The reversal of 133513233 is 332315331.

It is not a de Polignac number, because 133513233 - 2⁴ = 133513217 is a prime.

It is a super-2 number, since 2×133513233² = 35651566772224578, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (133513273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3691 + ... + 16752.

It is an arithmetic number, because the mean of its divisors is an integer number (12757056).

Almost surely, 2^133513233 is an apocalyptic number.

It is an amenable number.

133513233 is a deficient number, since it is larger than the sum of its proper divisors (70599663).

133513233 is a wasteful number, since it uses less digits than its factorization.

133513233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20764.

The product of its digits is 2430, while the sum is 24.

The square root of 133513233 is about 11554.7926420166. The cubic root of 133513233 is about 511.1026163557.

Adding to 133513233 its reverse (332315331), we get a palindrome (465828564).

The spelling of 133513233 in words is "one hundred thirty-three million, five hundred thirteen thousand, two hundred thirty-three".