135686213 has 12 divisors (see below), whose sum is σ = 148800960. Its totient is φ = 123651216.

The previous prime is 135686191. The next prime is 135686233. The reversal of 135686213 is 312686531.

It is not a de Polignac number, because 135686213 - 2¹⁴ = 135669829 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135686233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8270 + ... + 18432.

It is an arithmetic number, because the mean of its divisors is an integer number (12400080).

Almost surely, 2^135686213 is an apocalyptic number.

135686213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

135686213 is a deficient number, since it is larger than the sum of its proper divisors (13114747).

135686213 is a wasteful number, since it uses less digits than its factorization.

135686213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10268 (or 10255 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 135686213 is about 11648.4425139158. The cubic root of 135686213 is about 513.8605063384.

The spelling of 135686213 in words is "one hundred thirty-five million, six hundred eighty-six thousand, two hundred thirteen".