14227991 has 2 divisors, whose sum is σ = 14227992. Its totient is φ = 14227990.

The previous prime is 14227973. The next prime is 14228021. The reversal of 14227991 is 19972241.

14227991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 14227991 - 2²² = 10033687 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14227921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7113995 + 7113996.

It is an arithmetic number, because the mean of its divisors is an integer number (7113996).

Almost surely, 2^14227991 is an apocalyptic number.

14227991 is a deficient number, since it is larger than the sum of its proper divisors (1).

14227991 is an equidigital number, since it uses as much as digits as its factorization.

14227991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 35.

The square root of 14227991 is about 3772.0009278896. Note that the first 3 decimals coincide. The cubic root of 14227991 is about 242.3154992982.

The spelling of 14227991 in words is "fourteen million, two hundred twenty-seven thousand, nine hundred ninety-one".