221366796 has 96 divisors (see below), whose sum is σ = 633346560. Its totient is φ = 58765824.

The previous prime is 221366791. The next prime is 221366797. The reversal of 221366796 is 697663122.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (221366791) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83280 + ... + 85896.

It is an arithmetic number, because the mean of its divisors is an integer number (6597360).

Almost surely, 2^221366796 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 221366796, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (316673280).

221366796 is an abundant number, since it is smaller than the sum of its proper divisors (411979764).

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

221366796 is a wasteful number, since it uses less digits than its factorization.

221366796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2703 (or 2701 counting only the distinct ones).

The product of its digits is 163296, while the sum is 42.

The square root of 221366796 is about 14878.4003172384. The cubic root of 221366796 is about 604.9286585732.

The spelling of 221366796 in words is "two hundred twenty-one million, three hundred sixty-six thousand, seven hundred ninety-six".