221089486 has 16 divisors (see below), whose sum is σ = 335514960. Its totient is φ = 109258240.

The previous prime is 221089483. The next prime is 221089493. The reversal of 221089486 is 684980122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221089483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68910 + ... + 72046.

It is an arithmetic number, because the mean of its divisors is an integer number (20969685).

Almost surely, 2^221089486 is an apocalyptic number.

221089486 is a deficient number, since it is larger than the sum of its proper divisors (114425474).

221089486 is a wasteful number, since it uses less digits than its factorization.

221089486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3539.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 221089486 is about 14869.0781825909. The cubic root of 221089486 is about 604.6759515020.

The spelling of 221089486 in words is "two hundred twenty-one million, eighty-nine thousand, four hundred eighty-six".