221910798 has 16 divisors (see below), whose sum is σ = 444479616. Its totient is φ = 73860600.

The previous prime is 221910797. The next prime is 221910853. The reversal of 221910798 is 897019122.

221910798 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221910791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22978 + ... + 31173.

It is an arithmetic number, because the mean of its divisors is an integer number (27779976).

Almost surely, 2^221910798 is an apocalyptic number.

221910798 is an abundant number, since it is smaller than the sum of its proper divisors (222568818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221910798 is a wasteful number, since it uses less digits than its factorization.

221910798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54839.

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 221910798 is about 14896.6707018716. The cubic root of 221910798 is about 605.4237843156.

The spelling of 221910798 in words is "two hundred twenty-one million, nine hundred ten thousand, seven hundred ninety-eight".