133256013 has 32 divisors (see below), whose sum is σ = 206530560. Its totient is φ = 75528960.

The previous prime is 133255999. The next prime is 133256023. The reversal of 133256013 is 310652331.

It is a happy number.

It is not a de Polignac number, because 133256013 - 2⁸ = 133255757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133256023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99756 + ... + 101082.

It is an arithmetic number, because the mean of its divisors is an integer number (6454080).

Almost surely, 2^133256013 is an apocalyptic number.

It is an amenable number.

133256013 is a deficient number, since it is larger than the sum of its proper divisors (73274547).

133256013 is a wasteful number, since it uses less digits than its factorization.

133256013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1537.

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 133256013 is about 11543.6568296186. The cubic root of 133256013 is about 510.7741836661.

The spelling of 133256013 in words is "one hundred thirty-three million, two hundred fifty-six thousand, thirteen".