13243816 has 16 divisors (see below), whose sum is σ = 26293140. Its totient is φ = 6232320.

The previous prime is 13243793. The next prime is 13243819. The reversal of 13243816 is 61834231.

It can be written as a sum of positive squares in 2 ways, for example, as 11874916 + 1368900 = 3446^2 + 1170^2 .

It is not an unprimeable number, because it can be changed into a prime (13243819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48555 + ... + 48826.

Almost surely, 2^13243816 is an apocalyptic number.

It is an amenable number.

13243816 is a deficient number, since it is larger than the sum of its proper divisors (13049324).

13243816 is a wasteful number, since it uses less digits than its factorization.

13243816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97404 (or 97400 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 13243816 is about 3639.2054077779. The cubic root of 13243816 is about 236.5943555671.

The spelling of 13243816 in words is "thirteen million, two hundred forty-three thousand, eight hundred sixteen".