13912219 has 4 divisors (see below), whose sum is σ = 13923000. Its totient is φ = 13901440.

The previous prime is 13912201. The next prime is 13912231. The reversal of 13912219 is 91221931.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 91221931 = 2207 ⋅41333.

It is a cyclic number.

It is not a de Polignac number, because 13912219 - 2¹⁹ = 13387931 is a prime.

It is a super-2 number, since 2×13912219² = 387099675007922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13913219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3142 + ... + 6139.

It is an arithmetic number, because the mean of its divisors is an integer number (3480750).

Almost surely, 2^13912219 is an apocalyptic number.

13912219 is a deficient number, since it is larger than the sum of its proper divisors (10781).

13912219 is an equidigital number, since it uses as much as digits as its factorization.

13912219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10780.

The product of its digits is 972, while the sum is 28.

The square root of 13912219 is about 3729.9087120196. The cubic root of 13912219 is about 240.5094444650.

The spelling of 13912219 in words is "thirteen million, nine hundred twelve thousand, two hundred nineteen".