135281816 has 8 divisors (see below), whose sum is σ = 253653420. Its totient is φ = 67640904.

The previous prime is 135281743. The next prime is 135281819. The reversal of 135281816 is 618182531.

It is a tau number, because it is divible by the number of its divisors (8).

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 polite number, since it can be written as a sum of consecutive naturals, namely, 8455106 + ... + 8455121.

Almost surely, 2^135281816 is an apocalyptic number.

It is an amenable number.

135281816 is a deficient number, since it is larger than the sum of its proper divisors (118371604).

135281816 is a wasteful number, since it uses less digits than its factorization.

135281816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16910233 (or 16910229 counting only the distinct ones).

The product of its digits is 11520, while the sum is 35.

The square root of 135281816 is about 11631.0711458575. The cubic root of 135281816 is about 513.3494978137.

The spelling of 135281816 in words is "one hundred thirty-five million, two hundred eighty-one thousand, eight hundred sixteen".