221280441 has 16 divisors (see below), whose sum is σ = 310886400. Its totient is φ = 139613328.

The previous prime is 221280439. The next prime is 221280457. The reversal of 221280441 is 144082122.

221280441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221280441 - 2¹ = 221280439 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221280421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99160 + ... + 101366.

It is an arithmetic number, because the mean of its divisors is an integer number (19430400).

Almost surely, 2^221280441 is an apocalyptic number.

It is an amenable number.

221280441 is a deficient number, since it is larger than the sum of its proper divisors (89605959).

221280441 is a wasteful number, since it uses less digits than its factorization.

221280441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3988.

The product of its (nonzero) digits is 1024, while the sum is 24.

The square root of 221280441 is about 14875.4980084702. The cubic root of 221280441 is about 604.8499876230.

The spelling of 221280441 in words is "two hundred twenty-one million, two hundred eighty thousand, four hundred forty-one".