135281815 has 8 divisors (see below), whose sum is σ = 162422640. Its totient is φ = 108169152.

The previous prime is 135281743. The next prime is 135281819. The reversal of 135281815 is 518182531.

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 135281815 - 2¹³ = 135273623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135281819) 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 in 7 ways as a sum of consecutive naturals, for example, 5596 + ... + 17374.

It is an arithmetic number, because the mean of its divisors is an integer number (20302830).

Almost surely, 2^135281815 is an apocalyptic number.

135281815 is a deficient number, since it is larger than the sum of its proper divisors (27140825).

135281815 is a wasteful number, since it uses less digits than its factorization.

135281815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14081.

The product of its digits is 9600, while the sum is 34.

The square root of 135281815 is about 11631.0711028692. The cubic root of 135281815 is about 513.3494965488.

The spelling of 135281815 in words is "one hundred thirty-five million, two hundred eighty-one thousand, eight hundred fifteen".