135815013 has 6 divisors (see below), whose sum is σ = 196177254. Its totient is φ = 90543336.

The previous prime is 135814961. The next prime is 135815077. The reversal of 135815013 is 310518531.

It can be written as a sum of positive squares in only one way, i.e., 90212004 + 45603009 = 9498^2 + 6753^2 .

It is not a de Polignac number, because 135815013 - 2⁶ = 135814949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135815413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7545270 + ... + 7545287.

It is an arithmetic number, because the mean of its divisors is an integer number (32696209).

Almost surely, 2^135815013 is an apocalyptic number.

It is an amenable number.

135815013 is a deficient number, since it is larger than the sum of its proper divisors (60362241).

135815013 is a wasteful number, since it uses less digits than its factorization.

135815013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15090563 (or 15090560 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 135815013 is about 11653.9698386430. The cubic root of 135815013 is about 514.0230487729.

The spelling of 135815013 in words is "one hundred thirty-five million, eight hundred fifteen thousand, thirteen".