136856211 has 4 divisors (see below), whose sum is σ = 182474952. Its totient is φ = 91237472.

The previous prime is 136856207. The next prime is 136856243. The reversal of 136856211 is 112658631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112658631 = 3 ⋅37552877.

It is a cyclic number.

It is not a de Polignac number, because 136856211 - 2² = 136856207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (136856201) 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, 22809366 + ... + 22809371.

It is an arithmetic number, because the mean of its divisors is an integer number (45618738).

Almost surely, 2^136856211 is an apocalyptic number.

136856211 is a deficient number, since it is larger than the sum of its proper divisors (45618741).

136856211 is an equidigital number, since it uses as much as digits as its factorization.

136856211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45618740.

The product of its digits is 8640, while the sum is 33.

The square root of 136856211 is about 11698.5559365248. Note that the first 3 decimals coincide. The cubic root of 136856211 is about 515.3332571399. Note that the first 3 decimals are identical.

The spelling of 136856211 in words is "one hundred thirty-six million, eight hundred fifty-six thousand, two hundred eleven".