133453257 has 16 divisors (see below), whose sum is σ = 207685632. Its totient is φ = 74635920.

The previous prime is 133453241. The next prime is 133453277. The reversal of 133453257 is 752354331.

It is not a de Polignac number, because 133453257 - 2⁴ = 133453241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133453277) 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, 66619 + ... + 68592.

It is an arithmetic number, because the mean of its divisors is an integer number (12980352).

Almost surely, 2^133453257 is an apocalyptic number.

It is an amenable number.

133453257 is a deficient number, since it is larger than the sum of its proper divisors (74232375).

133453257 is a wasteful number, since it uses less digits than its factorization.

133453257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135268.

The product of its digits is 37800, while the sum is 33.

The square root of 133453257 is about 11552.1970637624. The cubic root of 133453257 is about 511.0260734268.

The spelling of 133453257 in words is "one hundred thirty-three million, four hundred fifty-three thousand, two hundred fifty-seven".