133172585 has 32 divisors (see below), whose sum is σ = 197417472. Its totient is φ = 83980800.

The previous prime is 133172579. The next prime is 133172593. The reversal of 133172585 is 585271331.

It is not a de Polignac number, because 133172585 - 2²⁰ = 132124009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 221285 + ... + 221885.

It is an arithmetic number, because the mean of its divisors is an integer number (6169296).

Almost surely, 2^133172585 is an apocalyptic number.

It is an amenable number.

133172585 is a deficient number, since it is larger than the sum of its proper divisors (64244887).

133172585 is a wasteful number, since it uses less digits than its factorization.

133172585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113.

The product of its digits is 25200, while the sum is 35.

The square root of 133172585 is about 11540.0426775641. The cubic root of 133172585 is about 510.6675674275.

The spelling of 133172585 in words is "one hundred thirty-three million, one hundred seventy-two thousand, five hundred eighty-five".