13862221 has 4 divisors (see below), whose sum is σ = 13880412. Its totient is φ = 13844032.

The previous prime is 13862213. The next prime is 13862231. The reversal of 13862221 is 12226831.

13862221 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.

It can be written as a sum of positive squares in 2 ways, for example, as 4796100 + 9066121 = 2190^2 + 3011^2 .

It is a cyclic number.

It is not a de Polignac number, because 13862221 - 2³ = 13862213 is a prime.

It is a super-2 number, since 2×13862221² = 384322342105682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13862201) 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, 7900 + ... + 9493.

It is an arithmetic number, because the mean of its divisors is an integer number (3470103).

Almost surely, 2^13862221 is an apocalyptic number.

It is an amenable number.

13862221 is a deficient number, since it is larger than the sum of its proper divisors (18191).

13862221 is an equidigital number, since it uses as much as digits as its factorization.

13862221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18190.

The product of its digits is 1152, while the sum is 25.

The square root of 13862221 is about 3723.2003706489. The cubic root of 13862221 is about 240.2209828076.

The spelling of 13862221 in words is "thirteen million, eight hundred sixty-two thousand, two hundred twenty-one".