136855281 has 4 divisors (see below), whose sum is σ = 182473712. Its totient is φ = 91236852.

The previous prime is 136855273. The next prime is 136855291. The reversal of 136855281 is 182558631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 136855281 - 2³ = 136855273 is a prime.

It is a super-2 number, since 2×136855281² = 37458735875177922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136855231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22809211 + ... + 22809216.

It is an arithmetic number, because the mean of its divisors is an integer number (45618428).

Almost surely, 2^136855281 is an apocalyptic number.

It is an amenable number.

136855281 is a deficient number, since it is larger than the sum of its proper divisors (45618431).

136855281 is an equidigital number, since it uses as much as digits as its factorization.

136855281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45618430.

The product of its digits is 57600, while the sum is 39.

The square root of 136855281 is about 11698.5161879616. The cubic root of 136855281 is about 515.3320898296.

The spelling of 136855281 in words is "one hundred thirty-six million, eight hundred fifty-five thousand, two hundred eighty-one".