221776896 has 88 divisors (see below), whose sum is σ = 644952384. Its totient is φ = 67194880.

The previous prime is 221776889. The next prime is 221776897. The reversal of 221776896 is 698677122.

It is a tau number, because it is divible by the number of its divisors (88).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (221776897) 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, 30511 + ... + 37073.

Almost surely, 2^221776896 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 221776896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (322476192).

221776896 is an abundant number, since it is smaller than the sum of its proper divisors (423175488).

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

221776896 is a wasteful number, since it uses less digits than its factorization.

221776896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6597 (or 6579 counting only the distinct ones).

The product of its digits is 508032, while the sum is 48.

The square root of 221776896 is about 14892.1756637504. The cubic root of 221776896 is about 605.3019879793.

The spelling of 221776896 in words is "two hundred twenty-one million, seven hundred seventy-six thousand, eight hundred ninety-six".