133513115 has 4 divisors (see below), whose sum is σ = 160215744. Its totient is φ = 106810488.

The previous prime is 133513103. The next prime is 133513117. The reversal of 133513115 is 511315331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 511315331 = 9067 ⋅56393.

It is a cyclic number.

It is not a de Polignac number, because 133513115 - 2⁴ = 133513099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133513117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13351307 + ... + 13351316.

It is an arithmetic number, because the mean of its divisors is an integer number (40053936).

Almost surely, 2^133513115 is an apocalyptic number.

133513115 is a deficient number, since it is larger than the sum of its proper divisors (26702629).

133513115 is an equidigital number, since it uses as much as digits as its factorization.

133513115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26702628.

The product of its digits is 675, while the sum is 23.

The square root of 133513115 is about 11554.7875359091. The cubic root of 133513115 is about 511.1024657835.

Adding to 133513115 its reverse (511315331), we get a palindrome (644828446).

The spelling of 133513115 in words is "one hundred thirty-three million, five hundred thirteen thousand, one hundred fifteen".