135228481 has 2 divisors, whose sum is σ = 135228482. Its totient is φ = 135228480.

The previous prime is 135228463. The next prime is 135228547. The reversal of 135228481 is 184822531.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134931456 + 297025 = 11616^2 + 545^2 .

It is an emirp because it is prime and its reverse (184822531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135228481 - 2⁹ = 135227969 is a prime.

It is a super-2 number, since 2×135228481² = 36573484147134722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (135228461) 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, 67614240 + 67614241.

It is an arithmetic number, because the mean of its divisors is an integer number (67614241).

Almost surely, 2^135228481 is an apocalyptic number.

It is an amenable number.

135228481 is a deficient number, since it is larger than the sum of its proper divisors (1).

135228481 is an equidigital number, since it uses as much as digits as its factorization.

135228481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15360, while the sum is 34.

The square root of 135228481 is about 11628.7781387384. The cubic root of 135228481 is about 513.2820260840.

The spelling of 135228481 in words is "one hundred thirty-five million, two hundred twenty-eight thousand, four hundred eighty-one".