135216443 has 8 divisors (see below), whose sum is σ = 138773856. Its totient is φ = 131702400.

The previous prime is 135216437. The next prime is 135216449. The reversal of 135216443 is 344612531.

It is an interprime number because it is at equal distance from previous prime (135216437) and next prime (135216449).

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 135216443 - 2⁴ = 135216427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135216449) 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, 4478 + ... + 17043.

It is an arithmetic number, because the mean of its divisors is an integer number (17346732).

Almost surely, 2^135216443 is an apocalyptic number.

135216443 is a deficient number, since it is larger than the sum of its proper divisors (3557413).

135216443 is a wasteful number, since it uses less digits than its factorization.

135216443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21685.

The product of its digits is 8640, while the sum is 29.

The square root of 135216443 is about 11628.2605319970. The cubic root of 135216443 is about 513.2667948932.

Adding to 135216443 its reverse (344612531), we get a palindrome (479828974).

The spelling of 135216443 in words is "one hundred thirty-five million, two hundred sixteen thousand, four hundred forty-three".