221795099 has 2 divisors, whose sum is σ = 221795100. Its totient is φ = 221795098.

The previous prime is 221795087. The next prime is 221795129. The reversal of 221795099 is 990597122.

It is a happy number.

221795099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221795099 is a prime.

It is not a weakly prime, because it can be changed into another prime (221795029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110897549 + 110897550.

It is an arithmetic number, because the mean of its divisors is an integer number (110897550).

Almost surely, 2^221795099 is an apocalyptic number.

221795099 is a deficient number, since it is larger than the sum of its proper divisors (1).

221795099 is an equidigital number, since it uses as much as digits as its factorization.

221795099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 102060, while the sum is 44.

The square root of 221795099 is about 14892.7868110707. The cubic root of 221795099 is about 605.3185481814.

The spelling of 221795099 in words is "two hundred twenty-one million, seven hundred ninety-five thousand, ninety-nine".