133811517 has 8 divisors (see below), whose sum is σ = 203903296. Its totient is φ = 76463712.

The previous prime is 133811501. The next prime is 133811527. The reversal of 133811517 is 715118331.

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

It is not a de Polignac number, because 133811517 - 2⁴ = 133811501 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 (133811527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3185968 + ... + 3186009.

It is an arithmetic number, because the mean of its divisors is an integer number (25487912).

Almost surely, 2^133811517 is an apocalyptic number.

It is an amenable number.

133811517 is a deficient number, since it is larger than the sum of its proper divisors (70091779).

133811517 is an equidigital number, since it uses as much as digits as its factorization.

133811517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6371987.

The product of its digits is 2520, while the sum is 30.

The square root of 133811517 is about 11567.6928123114. The cubic root of 133811517 is about 511.4829540371.

Adding to 133811517 its reverse (715118331), we get a palindrome (848929848).

The spelling of 133811517 in words is "one hundred thirty-three million, eight hundred eleven thousand, five hundred seventeen".