136355281 has 2 divisors, whose sum is σ = 136355282. Its totient is φ = 136355280.

The previous prime is 136355269. The next prime is 136355309. The reversal of 136355281 is 182553631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102819600 + 33535681 = 10140^2 + 5791^2 .

It is a cyclic number.

It is not a de Polignac number, because 136355281 - 2⁹ = 136354769 is a prime.

It is a super-2 number, since 2×136355281² = 37185525313177922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (136355221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68177640 + 68177641.

It is an arithmetic number, because the mean of its divisors is an integer number (68177641).

Almost surely, 2^136355281 is an apocalyptic number.

It is an amenable number.

136355281 is a deficient number, since it is larger than the sum of its proper divisors (1).

136355281 is an equidigital number, since it uses as much as digits as its factorization.

136355281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 34.

The square root of 136355281 is about 11677.1264016452. The cubic root of 136355281 is about 514.7037363472.

It can be divided in two parts, 1363 and 55281, that added together give a square (56644 = 238²).

The spelling of 136355281 in words is "one hundred thirty-six million, three hundred fifty-five thousand, two hundred eighty-one".