13803321 has 16 divisors (see below), whose sum is σ = 21233664. Its totient is φ = 7812624.

The previous prime is 13803319. The next prime is 13803389. The reversal of 13803321 is 12330831.

It is a happy number.

It is not a de Polignac number, because 13803321 - 2¹ = 13803319 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (13803311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 825 + ... + 5318.

It is an arithmetic number, because the mean of its divisors is an integer number (1327104).

Almost surely, 2^13803321 is an apocalyptic number.

It is an amenable number.

13803321 is a deficient number, since it is larger than the sum of its proper divisors (7430343).

13803321 is a wasteful number, since it uses less digits than its factorization.

13803321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6260.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 13803321 is about 3715.2820888864. The cubic root of 13803321 is about 239.8802701409.

The spelling of 13803321 in words is "thirteen million, eight hundred three thousand, three hundred twenty-one".