221600399999 has 24 divisors (see below), whose sum is σ = 257366347248. Its totient is φ = 189188490240.

The previous prime is 221600399989. The next prime is 221600400011. The reversal of 221600399999 is 999993006122.

It is not a de Polignac number, because 221600399999 - 2⁴ = 221600399983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221600399989) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1376537 + ... + 1529069.

It is an arithmetic number, because the mean of its divisors is an integer number (10723597802).

Almost surely, 2^221600399999 is an apocalyptic number.

221600399999 is a deficient number, since it is larger than the sum of its proper divisors (35765947249).

221600399999 is a wasteful number, since it uses less digits than its factorization.

221600399999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153035 (or 153018 counting only the distinct ones).

The product of its (nonzero) digits is 4251528, while the sum is 59.

The spelling of 221600399999 in words is "two hundred twenty-one billion, six hundred million, three hundred ninety-nine thousand, nine hundred ninety-nine".