13971224 has 32 divisors (see below), whose sum is σ = 27079920. Its totient is φ = 6754176.

The previous prime is 13971197. The next prime is 13971227. The reversal of 13971224 is 42217931.

13971224 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13971227) 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, 34994 + ... + 35390.

Almost surely, 2^13971224 is an apocalyptic number.

It is an amenable number.

13971224 is a deficient number, since it is larger than the sum of its proper divisors (13108696).

13971224 is a wasteful number, since it uses less digits than its factorization.

13971224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539 (or 535 counting only the distinct ones).

The product of its digits is 3024, while the sum is 29.

The square root of 13971224 is about 3737.8100540290. The cubic root of 13971224 is about 240.8489839754.

The spelling of 13971224 in words is "thirteen million, nine hundred seventy-one thousand, two hundred twenty-four".