133203285 has 20 divisors (see below), whose sum is σ = 238779948. Its totient is φ = 71041536.

The previous prime is 133203271. The next prime is 133203307. The reversal of 133203285 is 582302331.

133203285 is a `hidden beast` number, since 1 + 332 + 0 + 328 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 51065316 + 82137969 = 7146^2 + 9063^2 .

It is not a de Polignac number, because 133203285 - 2⁴ = 133203269 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 164044 + ... + 164853.

Almost surely, 2^133203285 is an apocalyptic number.

133203285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133203285 is a deficient number, since it is larger than the sum of its proper divisors (105576663).

133203285 is an equidigital number, since it uses as much as digits as its factorization.

133203285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328914 (or 328905 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 133203285 is about 11541.3727519737. The cubic root of 133203285 is about 510.7068054578.

The spelling of 133203285 in words is "one hundred thirty-three million, two hundred three thousand, two hundred eighty-five".