221098976 has 108 divisors (see below), whose sum is σ = 525463848. Its totient is φ = 91300608.

The previous prime is 221098967. The next prime is 221099033. The reversal of 221098976 is 679890122.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2146541 + ... + 2146643.

It is an arithmetic number, because the mean of its divisors is an integer number (4865406).

Almost surely, 2^221098976 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 221098976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262731924).

221098976 is an abundant number, since it is smaller than the sum of its proper divisors (304364872).

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

221098976 is a wasteful number, since it uses less digits than its factorization.

221098976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 221098976 is about 14869.3972978060. The cubic root of 221098976 is about 604.6846030406.

The spelling of 221098976 in words is "two hundred twenty-one million, ninety-eight thousand, nine hundred seventy-six".