221105285 has 8 divisors (see below), whose sum is σ = 265416480. Its totient is φ = 176824144.

The previous prime is 221105263. The next prime is 221105321. The reversal of 221105285 is 582501122.

221105285 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221105285 - 2⁶ = 221105221 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14594 + ... + 25596.

It is an arithmetic number, because the mean of its divisors is an integer number (33177060).

Almost surely, 2^221105285 is an apocalyptic number.

It is an amenable number.

221105285 is a deficient number, since it is larger than the sum of its proper divisors (44311195).

221105285 is a wasteful number, since it uses less digits than its factorization.

221105285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15027.

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 221105285 is about 14869.6094434252. The cubic root of 221105285 is about 604.6903544902.

The spelling of 221105285 in words is "two hundred twenty-one million, one hundred five thousand, two hundred eighty-five".