136231818 has 32 divisors (see below), whose sum is σ = 277862400. Its totient is φ = 44518320.

The previous prime is 136231813. The next prime is 136231819. The reversal of 136231818 is 818132631.

136231818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (136231813) 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, 83971 + ... + 85577.

It is an arithmetic number, because the mean of its divisors is an integer number (8683200).

Almost surely, 2^136231818 is an apocalyptic number.

136231818 is an abundant number, since it is smaller than the sum of its proper divisors (141630582).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

136231818 is a wasteful number, since it uses less digits than its factorization.

136231818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1882.

The product of its digits is 6912, while the sum is 33.

The square root of 136231818 is about 11671.8386726342. The cubic root of 136231818 is about 514.5483431320.

The spelling of 136231818 in words is "one hundred thirty-six million, two hundred thirty-one thousand, eight hundred eighteen".