133504215 has 16 divisors (see below), whose sum is σ = 230038368. Its totient is φ = 65725056.

The previous prime is 133504201. The next prime is 133504219. The reversal of 133504215 is 512405331.

It is not a de Polignac number, because 133504215 - 2⁴ = 133504199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133504219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342124 + ... + 342513.

It is an arithmetic number, because the mean of its divisors is an integer number (14377398).

Almost surely, 2^133504215 is an apocalyptic number.

133504215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

133504215 is a deficient number, since it is larger than the sum of its proper divisors (96534153).

133504215 is a wasteful number, since it uses less digits than its factorization.

133504215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684658.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 133504215 is about 11554.4024077405. The cubic root of 133504215 is about 511.0911088143.

Adding to 133504215 its reverse (512405331), we get a palindrome (645909546).

The spelling of 133504215 in words is "one hundred thirty-three million, five hundred four thousand, two hundred fifteen".