13921222 has 32 divisors (see below), whose sum is σ = 24837120. Its totient is φ = 5728320.

The previous prime is 13921217. The next prime is 13921223. The reversal of 13921222 is 22212931.

It is a junction number, because it is equal to n+sod(n) for n = 13921193 and 13921202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13921223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45193 + ... + 45499.

It is an arithmetic number, because the mean of its divisors is an integer number (776160).

Almost surely, 2^13921222 is an apocalyptic number.

13921222 is a deficient number, since it is larger than the sum of its proper divisors (10915898).

13921222 is a wasteful number, since it uses less digits than its factorization.

13921222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436.

The product of its digits is 432, while the sum is 22.

The square root of 13921222 is about 3731.1153828313. The cubic root of 13921222 is about 240.5613134879.

The spelling of 13921222 in words is "thirteen million, nine hundred twenty-one thousand, two hundred twenty-two".