133512517 has 4 divisors (see below), whose sum is σ = 133592800. Its totient is φ = 133432236.

The previous prime is 133512479. The next prime is 133512521. The reversal of 133512517 is 715215331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 715215331 = 24923 ⋅28697.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133512517 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 (133512527) 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 3 ways as a sum of consecutive naturals, for example, 37593 + ... + 40990.

It is an arithmetic number, because the mean of its divisors is an integer number (33398200).

Almost surely, 2^133512517 is an apocalyptic number.

It is an amenable number.

133512517 is a deficient number, since it is larger than the sum of its proper divisors (80283).

133512517 is an equidigital number, since it uses as much as digits as its factorization.

133512517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80282.

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

The square root of 133512517 is about 11554.7616591603. The cubic root of 133512517 is about 511.1017027131.

Adding to 133512517 its reverse (715215331), we get a palindrome (848727848).

The spelling of 133512517 in words is "one hundred thirty-three million, five hundred twelve thousand, five hundred seventeen".