13858221 has 8 divisors (see below), whose sum is σ = 19899040. Its totient is φ = 8528112.

The previous prime is 13858219. The next prime is 13858231. The reversal of 13858221 is 12285831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13858221 - 2¹ = 13858219 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 (13858231) 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, 177631 + ... + 177708.

It is an arithmetic number, because the mean of its divisors is an integer number (2487380).

Almost surely, 2^13858221 is an apocalyptic number.

It is an amenable number.

13858221 is a deficient number, since it is larger than the sum of its proper divisors (6040819).

13858221 is a wasteful number, since it uses less digits than its factorization.

13858221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355355.

The product of its digits is 3840, while the sum is 30.

The square root of 13858221 is about 3722.6631596211. The cubic root of 13858221 is about 240.1978750058.

The spelling of 13858221 in words is "thirteen million, eight hundred fifty-eight thousand, two hundred twenty-one".