221910696 has 96 divisors (see below), whose sum is σ = 703684800. Its totient is φ = 61850880.

The previous prime is 221910677. The next prime is 221910701. The reversal of 221910696 is 696019122.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 221910696.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15295 + ... + 26033.

It is an arithmetic number, because the mean of its divisors is an integer number (7330050).

Almost surely, 2^221910696 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221910696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (351842400).

221910696 is an abundant number, since it is smaller than the sum of its proper divisors (481774104).

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

221910696 is a wasteful number, since it uses less digits than its factorization.

221910696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10799 (or 10792 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 221910696 is about 14896.6672782874. The cubic root of 221910696 is about 605.4236915557.

The spelling of 221910696 in words is "two hundred twenty-one million, nine hundred ten thousand, six hundred ninety-six".