221400199 has 2 divisors, whose sum is σ = 221400200. Its totient is φ = 221400198.

The previous prime is 221400191. The next prime is 221400211. The reversal of 221400199 is 991004122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221400199 - 2³ = 221400191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221400191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110700099 + 110700100.

It is an arithmetic number, because the mean of its divisors is an integer number (110700100).

Almost surely, 2^221400199 is an apocalyptic number.

221400199 is a deficient number, since it is larger than the sum of its proper divisors (1).

221400199 is an equidigital number, since it uses as much as digits as its factorization.

221400199 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 221400199 is about 14879.5228082086. The cubic root of 221400199 is about 604.9590838162.

The spelling of 221400199 in words is "two hundred twenty-one million, four hundred thousand, one hundred ninety-nine".