133565872 has 40 divisors (see below), whose sum is σ = 298922832. Its totient is φ = 57139200.

The previous prime is 133565863. The next prime is 133565879. The reversal of 133565872 is 278565331.

It is not an unprimeable number, because it can be changed into a prime (133565879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19329 + ... + 25312.

Almost surely, 2^133565872 is an apocalyptic number.

It is an amenable number.

133565872 is an abundant number, since it is smaller than the sum of its proper divisors (165356960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133565872 is a wasteful number, since it uses less digits than its factorization.

133565872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44677 (or 44671 counting only the distinct ones).

The product of its digits is 151200, while the sum is 40.

The square root of 133565872 is about 11557.0702169711. The cubic root of 133565872 is about 511.1697767289.

The spelling of 133565872 in words is "one hundred thirty-three million, five hundred sixty-five thousand, eight hundred seventy-two".