136208281 has 8 divisors (see below), whose sum is σ = 148747104. Its totient is φ = 123695520.

The previous prime is 136208239. The next prime is 136208299. The reversal of 136208281 is 182802631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 136208281 - 2¹¹ = 136206233 is a prime.

It is a super-2 number, since 2×136208281² = 37105391625949922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (136208221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5370 + ... + 17356.

It is an arithmetic number, because the mean of its divisors is an integer number (18593388).

Almost surely, 2^136208281 is an apocalyptic number.

136208281 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

136208281 is a deficient number, since it is larger than the sum of its proper divisors (12538823).

136208281 is a wasteful number, since it uses less digits than its factorization.

136208281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13031.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 136208281 is about 11670.8303474946. The cubic root of 136208281 is about 514.5187082981.

The spelling of 136208281 in words is "one hundred thirty-six million, two hundred eight thousand, two hundred eighty-one".