221976696 has 64 divisors (see below), whose sum is σ = 588902400. Its totient is φ = 69527808.

The previous prime is 221976679. The next prime is 221976719. The reversal of 221976696 is 696679122.

221976696 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 an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55996 + ... + 59828.

It is an arithmetic number, because the mean of its divisors is an integer number (9201600).

Almost surely, 2^221976696 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 221976696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294451200).

221976696 is an abundant number, since it is smaller than the sum of its proper divisors (366925704).

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

221976696 is a wasteful number, since it uses less digits than its factorization.

221976696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3988 (or 3984 counting only the distinct ones).

The product of its digits is 489888, while the sum is 48.

The square root of 221976696 is about 14898.8823741917. The cubic root of 221976696 is about 605.4837066934.

The spelling of 221976696 in words is "two hundred twenty-one million, nine hundred seventy-six thousand, six hundred ninety-six".