221966080 has 108 divisors (see below), whose sum is σ = 618657480. Its totient is φ = 76081152.

The previous prime is 221966057. The next prime is 221966081. The reversal of 221966080 is 80669122.

It is a happy number.

221966080 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221966081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60951 + ... + 64489.

It is an arithmetic number, because the mean of its divisors is an integer number (5728310).

Almost surely, 2^221966080 is an apocalyptic number.

221966080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221966080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309328740).

221966080 is an abundant number, since it is smaller than the sum of its proper divisors (396691400).

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

221966080 is an equidigital number, since it uses as much as digits as its factorization.

221966080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3574 (or 3553 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 221966080 is about 14898.5261015981. The cubic root of 221966080 is about 605.4740541524.

The spelling of 221966080 in words is "two hundred twenty-one million, nine hundred sixty-six thousand, eighty".