133515217 has 16 divisors (see below), whose sum is σ = 151145280. Its totient is φ = 116827200.

The previous prime is 133515163. The next prime is 133515241. The reversal of 133515217 is 712515331.

It is a cyclic number.

It is not a de Polignac number, because 133515217 - 2¹⁹ = 132990929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133515247) 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 15 ways as a sum of consecutive naturals, for example, 181783 + ... + 182515.

It is an arithmetic number, because the mean of its divisors is an integer number (9446580).

Almost surely, 2^133515217 is an apocalyptic number.

It is an amenable number.

133515217 is a deficient number, since it is larger than the sum of its proper divisors (17630063).

133515217 is a wasteful number, since it uses less digits than its factorization.

133515217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344.

The product of its digits is 3150, while the sum is 28.

The square root of 133515217 is about 11554.8784935195. The cubic root of 133515217 is about 511.1051479963.

It can be divided in two parts, 13351521 and 7, that added together give a triangular number (13351528 = T₅₁₆₇).

The spelling of 133515217 in words is "one hundred thirty-three million, five hundred fifteen thousand, two hundred seventeen".