221040205 has 48 divisors (see below), whose sum is σ = 303266880. Its totient is φ = 154165248.

The previous prime is 221040187. The next prime is 221040229. The reversal of 221040205 is 502040122.

It is not a de Polignac number, because 221040205 - 2¹⁷ = 220909133 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2278717 + ... + 2278813.

It is an arithmetic number, because the mean of its divisors is an integer number (6318060).

Almost surely, 2^221040205 is an apocalyptic number.

It is an amenable number.

221040205 is a deficient number, since it is larger than the sum of its proper divisors (82226675).

221040205 is a wasteful number, since it uses less digits than its factorization.

221040205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238 (or 221 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 221040205 is about 14867.4209263073. The cubic root of 221040205 is about 604.6310206002.

Adding to 221040205 its reverse (502040122), we get a palindrome (723080327).

The spelling of 221040205 in words is "two hundred twenty-one million, forty thousand, two hundred five".