13982221 has 4 divisors (see below), whose sum is σ = 15253344. Its totient is φ = 12711100.

The previous prime is 13982197. The next prime is 13982231. The reversal of 13982221 is 12228931.

13982221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13982221 - 2⁷ = 13982093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13982221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13982231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 635545 + ... + 635566.

It is an arithmetic number, because the mean of its divisors is an integer number (3813336).

Almost surely, 2^13982221 is an apocalyptic number.

13982221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13982221 is a deficient number, since it is larger than the sum of its proper divisors (1271123).

13982221 is a wasteful number, since it uses less digits than its factorization.

13982221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271122.

The product of its digits is 1728, while the sum is 28.

The square root of 13982221 is about 3739.2808132046. The cubic root of 13982221 is about 240.9121595820.

The spelling of 13982221 in words is "thirteen million, nine hundred eighty-two thousand, two hundred twenty-one".