13221914 has 16 divisors (see below), whose sum is σ = 20400000. Its totient is φ = 6424704.

The previous prime is 13221911. The next prime is 13221917. The reversal of 13221914 is 41912231.

It is an interprime number because it is at equal distance from previous prime (13221911) and next prime (13221917).

It is a self number, because there is not a number n which added to its sum of digits gives 13221914.

It is not an unprimeable number, because it can be changed into a prime (13221911) 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, 9962 + ... + 11210.

It is an arithmetic number, because the mean of its divisors is an integer number (1275000).

Almost surely, 2^13221914 is an apocalyptic number.

13221914 is a deficient number, since it is larger than the sum of its proper divisors (7178086).

13221914 is a wasteful number, since it uses less digits than its factorization.

13221914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397.

The product of its digits is 432, while the sum is 23.

The square root of 13221914 is about 3636.1949892711. The cubic root of 13221914 is about 236.4638607327.

It can be divided in two parts, 13 and 221914, that multiplied together give a palindrome (2884882).

The spelling of 13221914 in words is "thirteen million, two hundred twenty-one thousand, nine hundred fourteen".