136218511 has 16 divisors (see below), whose sum is σ = 162237600. Its totient is φ = 112734720.

The previous prime is 136218503. The next prime is 136218527. The reversal of 136218511 is 115812631.

136218511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 136218511 - 2³ = 136218503 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 136218511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136218911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3915 + ... + 16963.

It is an arithmetic number, because the mean of its divisors is an integer number (10139850).

Almost surely, 2^136218511 is an apocalyptic number.

136218511 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

136218511 is a deficient number, since it is larger than the sum of its proper divisors (26019089).

136218511 is a wasteful number, since it uses less digits than its factorization.

136218511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13146.

The product of its digits is 1440, while the sum is 28.

The square root of 136218511 is about 11671.2686114235. The cubic root of 136218511 is about 514.5315890485.

The spelling of 136218511 in words is "one hundred thirty-six million, two hundred eighteen thousand, five hundred eleven".