221088846 has 64 divisors (see below), whose sum is σ = 496336896. Its totient is φ = 65080800.

The previous prime is 221088841. The next prime is 221088853. The reversal of 221088846 is 648880122.

221088846 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221088846² = 97760555651223432, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221088841) 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, 815691 + ... + 815961.

It is an arithmetic number, because the mean of its divisors is an integer number (7755264).

Almost surely, 2^221088846 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221088846, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248168448).

221088846 is an abundant number, since it is smaller than the sum of its proper divisors (275248050).

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

221088846 is a wasteful number, since it uses less digits than its factorization.

221088846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597.

The product of its (nonzero) digits is 49152, while the sum is 39.

The square root of 221088846 is about 14869.0566614026. The cubic root of 221088846 is about 604.6753680384.

The spelling of 221088846 in words is "two hundred twenty-one million, eighty-eight thousand, eight hundred forty-six".