220399999 has 2 divisors, whose sum is σ = 220400000. Its totient is φ = 220399998.

The previous prime is 220399997. The next prime is 220400003. The reversal of 220399999 is 999993022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220399999 - 2¹ = 220399997 is a prime.

Together with 220399997, it forms a pair of twin primes.

220399999 is a modest number, since divided by 99999 gives 2203 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220399997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110199999 + 110200000.

It is an arithmetic number, because the mean of its divisors is an integer number (110200000).

Almost surely, 2^220399999 is an apocalyptic number.

220399999 is a deficient number, since it is larger than the sum of its proper divisors (1).

220399999 is an equidigital number, since it uses as much as digits as its factorization.

220399999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 708588, while the sum is 52.

The square root of 220399999 is about 14845.8748142371. The cubic root of 220399999 is about 604.0467185695.

The spelling of 220399999 in words is "two hundred twenty million, three hundred ninety-nine thousand, nine hundred ninety-nine".