221095056 has 160 divisors (see below), whose sum is σ = 718009600. Its totient is φ = 58254336.

The previous prime is 221095051. The next prime is 221095057. The reversal of 221095056 is 650590122.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (221095051) 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, 213516 + ... + 214548.

It is an arithmetic number, because the mean of its divisors is an integer number (4487560).

Almost surely, 2^221095056 is an apocalyptic number.

221095056 is a gapful number since it is divisible by the number (26) 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 221095056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (359004800).

221095056 is an abundant number, since it is smaller than the sum of its proper divisors (496914544).

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

221095056 is a wasteful number, since it uses less digits than its factorization.

221095056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078 (or 1058 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 221095056 is about 14869.2654828677. The cubic root of 221095056 is about 604.6810294108.

The spelling of 221095056 in words is "two hundred twenty-one million, ninety-five thousand, fifty-six".