214905191 has 2 divisors, whose sum is σ = 214905192. Its totient is φ = 214905190.

The previous prime is 214905157. The next prime is 214905239. The reversal of 214905191 is 191509412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 214905191 - 2¹⁰ = 214904167 is a prime.

It is a super-2 number, since 2×214905191² = 92368482237492962, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (214905151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107452595 + 107452596.

It is an arithmetic number, because the mean of its divisors is an integer number (107452596).

Almost surely, 2^214905191 is an apocalyptic number.

214905191 is a deficient number, since it is larger than the sum of its proper divisors (1).

214905191 is an equidigital number, since it uses as much as digits as its factorization.

214905191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 32.

The square root of 214905191 is about 14659.6449820587. The cubic root of 214905191 is about 598.9845704371.

The spelling of 214905191 in words is "two hundred fourteen million, nine hundred five thousand, one hundred ninety-one".