133215887 has 8 divisors (see below), whose sum is σ = 154743072. Its totient is φ = 112312800.

The previous prime is 133215877. The next prime is 133215889. The reversal of 133215887 is 788512331.

It is a happy number.

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 133215887 - 2¹⁴ = 133199503 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133215887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133215889) 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, 155564 + ... + 156417.

It is an arithmetic number, because the mean of its divisors is an integer number (19342884).

Almost surely, 2^133215887 is an apocalyptic number.

133215887 is a deficient number, since it is larger than the sum of its proper divisors (21527185).

133215887 is an equidigital number, since it uses as much as digits as its factorization.

133215887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312049.

The product of its digits is 40320, while the sum is 38.

The square root of 133215887 is about 11541.9186879825. The cubic root of 133215887 is about 510.7229104766.

The spelling of 133215887 in words is "one hundred thirty-three million, two hundred fifteen thousand, eight hundred eighty-seven".