135131513 has 4 divisors (see below), whose sum is σ = 147416208. Its totient is φ = 122846820.

The previous prime is 135131501. The next prime is 135131519. The reversal of 135131513 is 315131531.

135131513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 135131513 - 2⁴ = 135131497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135131519) 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, 6142331 + ... + 6142352.

It is an arithmetic number, because the mean of its divisors is an integer number (36854052).

Almost surely, 2^135131513 is an apocalyptic number.

It is an amenable number.

135131513 is a deficient number, since it is larger than the sum of its proper divisors (12284695).

135131513 is a wasteful number, since it uses less digits than its factorization.

135131513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12284694.

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

The square root of 135131513 is about 11624.6080794150. The cubic root of 135131513 is about 513.1593107297.

The spelling of 135131513 in words is "one hundred thirty-five million, one hundred thirty-one thousand, five hundred thirteen".