133155297 has 18 divisors (see below), whose sum is σ = 211411746. Its totient is φ = 80699520.

The previous prime is 133155289. The next prime is 133155299. The reversal of 133155297 is 792551331.

133155297 is a `hidden beast` number, since 13 + 3 + 1 + 552 + 97 = 666.

It can be written as a sum of positive squares in only one way, i.e., 128119761 + 5035536 = 11319^2 + 2244^2 .

It is not a de Polignac number, because 133155297 - 2³ = 133155289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133155299) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 60048 + ... + 62225.

It is an arithmetic number, because the mean of its divisors is an integer number (11745097).

Almost surely, 2^133155297 is an apocalyptic number.

It is an amenable number.

133155297 is a deficient number, since it is larger than the sum of its proper divisors (78256449).

133155297 is a wasteful number, since it uses less digits than its factorization.

133155297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122301 (or 122287 counting only the distinct ones).

The product of its digits is 28350, while the sum is 36.

The square root of 133155297 is about 11539.2936092293. The cubic root of 133155297 is about 510.6454687777.

The spelling of 133155297 in words is "one hundred thirty-three million, one hundred fifty-five thousand, two hundred ninety-seven".