133243915 has 16 divisors (see below), whose sum is σ = 182926080. Its totient is φ = 91271520.

The previous prime is 133243843. The next prime is 133243933. The reversal of 133243915 is 519342331.

It is not a de Polignac number, because 133243915 - 2⁹ = 133243403 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54060 + ... + 56470.

It is an arithmetic number, because the mean of its divisors is an integer number (11432880).

Almost surely, 2^133243915 is an apocalyptic number.

133243915 is a deficient number, since it is larger than the sum of its proper divisors (49682165).

133243915 is a wasteful number, since it uses less digits than its factorization.

133243915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4002.

The product of its digits is 9720, while the sum is 31.

The square root of 133243915 is about 11543.1328069983. The cubic root of 133243915 is about 510.7587258694.

The spelling of 133243915 in words is "one hundred thirty-three million, two hundred forty-three thousand, nine hundred fifteen".