133571145 has 16 divisors (see below), whose sum is σ = 214206912. Its totient is φ = 71073600.

The previous prime is 133571131. The next prime is 133571167. The reversal of 133571145 is 541175331.

It is not a de Polignac number, because 133571145 - 2¹⁰ = 133570121 is a prime.

It is a super-2 number, since 2×133571145² = 35682501553222050, which contains 22 as substring.

It is a nialpdrome in base 8.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3406 + ... + 16695.

It is an arithmetic number, because the mean of its divisors is an integer number (13387932).

Almost surely, 2^133571145 is an apocalyptic number.

133571145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133571145 is a deficient number, since it is larger than the sum of its proper divisors (80635767).

133571145 is a wasteful number, since it uses less digits than its factorization.

133571145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20552.

The product of its digits is 6300, while the sum is 30.

The square root of 133571145 is about 11557.2983434711. The cubic root of 133571145 is about 511.1765034042.

The spelling of 133571145 in words is "one hundred thirty-three million, five hundred seventy-one thousand, one hundred forty-five".