14911221 has 16 divisors (see below), whose sum is σ = 21484736. Its totient is φ = 9144576.

The previous prime is 14911213. The next prime is 14911231. The reversal of 14911221 is 12211941.

It is a happy number.

It is not a de Polignac number, because 14911221 - 2³ = 14911213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14911201) 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, 16446 + ... + 17328.

It is an arithmetic number, because the mean of its divisors is an integer number (1342796).

Almost surely, 2^14911221 is an apocalyptic number.

It is an amenable number.

14911221 is a deficient number, since it is larger than the sum of its proper divisors (6573515).

14911221 is a wasteful number, since it uses less digits than its factorization.

14911221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332.

The product of its digits is 144, while the sum is 21.

The square root of 14911221 is about 3861.5050174770. The cubic root of 14911221 is about 246.1336936051.

The spelling of 14911221 in words is "fourteen million, nine hundred eleven thousand, two hundred twenty-one".