133885257 has 16 divisors (see below), whose sum is σ = 201458880. Its totient is φ = 78344000.

The previous prime is 133885253. The next prime is 133885289. The reversal of 133885257 is 752588331.

It is a cyclic number.

It is not a de Polignac number, because 133885257 - 2² = 133885253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133885253) 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, 68994 + ... + 70907.

It is an arithmetic number, because the mean of its divisors is an integer number (12591180).

Almost surely, 2^133885257 is an apocalyptic number.

It is an amenable number.

133885257 is a deficient number, since it is larger than the sum of its proper divisors (67573623).

133885257 is a wasteful number, since it uses less digits than its factorization.

133885257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139944.

The product of its digits is 201600, while the sum is 42.

The square root of 133885257 is about 11570.8796986227. The cubic root of 133885257 is about 511.5768917085.

The spelling of 133885257 in words is "one hundred thirty-three million, eight hundred eighty-five thousand, two hundred fifty-seven".