221676799 has 2 divisors, whose sum is σ = 221676800. Its totient is φ = 221676798.

The previous prime is 221676761. The next prime is 221676817. The reversal of 221676799 is 997676122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221676799 - 2¹¹ = 221674751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221671799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110838399 + 110838400.

It is an arithmetic number, because the mean of its divisors is an integer number (110838400).

Almost surely, 2^221676799 is an apocalyptic number.

221676799 is a deficient number, since it is larger than the sum of its proper divisors (1).

221676799 is an equidigital number, since it uses as much as digits as its factorization.

221676799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 571536, while the sum is 49.

The square root of 221676799 is about 14888.8145599306. The cubic root of 221676799 is about 605.2109084126.

The spelling of 221676799 in words is "two hundred twenty-one million, six hundred seventy-six thousand, seven hundred ninety-nine".