133530287 has 8 divisors (see below), whose sum is σ = 145780992. Its totient is φ = 121298200.

The previous prime is 133530277. The next prime is 133530307. The reversal of 133530287 is 782035331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133530287 - 2⁸ = 133530031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133530247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13418 + ... + 21144.

It is an arithmetic number, because the mean of its divisors is an integer number (18222624).

Almost surely, 2^133530287 is an apocalyptic number.

133530287 is a deficient number, since it is larger than the sum of its proper divisors (12250705).

133530287 is a wasteful number, since it uses less digits than its factorization.

133530287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9309.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 133530287 is about 11555.5305806354. The cubic root of 133530287 is about 511.1243769276.

The spelling of 133530287 in words is "one hundred thirty-three million, five hundred thirty thousand, two hundred eighty-seven".