13833221 has 4 divisors (see below), whose sum is σ = 13942272. Its totient is φ = 13724172.

The previous prime is 13833191. The next prime is 13833247. The reversal of 13833221 is 12233831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12233831 = 53 ⋅230827.

It is a cyclic number.

It is not a de Polignac number, because 13833221 - 2¹⁴ = 13816837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13833251) 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, 54335 + ... + 54588.

It is an arithmetic number, because the mean of its divisors is an integer number (3485568).

Almost surely, 2^13833221 is an apocalyptic number.

It is an amenable number.

13833221 is a deficient number, since it is larger than the sum of its proper divisors (109051).

13833221 is a wasteful number, since it uses less digits than its factorization.

13833221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109050.

The product of its digits is 864, while the sum is 23.

The square root of 13833221 is about 3719.3038327085. The cubic root of 13833221 is about 240.0533504082.

The spelling of 13833221 in words is "thirteen million, eight hundred thirty-three thousand, two hundred twenty-one".