135136213 has 8 divisors (see below), whose sum is σ = 145046808. Its totient is φ = 125443584.

The previous prime is 135136163. The next prime is 135136219. The reversal of 135136213 is 312631531.

It can be written as a sum of positive squares in 4 ways, for example, as 37185604 + 97950609 = 6098^2 + 9897^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 135136213 - 2⁹ = 135135701 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 (135136219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53206 + ... + 55687.

It is an arithmetic number, because the mean of its divisors is an integer number (18130851).

Almost surely, 2^135136213 is an apocalyptic number.

It is an amenable number.

135136213 is a deficient number, since it is larger than the sum of its proper divisors (9910595).

135136213 is a wasteful number, since it uses less digits than its factorization.

135136213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108983.

The product of its digits is 1620, while the sum is 25.

The square root of 135136213 is about 11624.8102350103. The cubic root of 135136213 is about 513.1652600471.

Adding to 135136213 its reverse (312631531), we get a palindrome (447767744).

The spelling of 135136213 in words is "one hundred thirty-five million, one hundred thirty-six thousand, two hundred thirteen".