221070605 has 24 divisors (see below), whose sum is σ = 324845280. Its totient is φ = 143609760.

The previous prime is 221070599. The next prime is 221070613. The reversal of 221070605 is 506070122.

It is not a de Polignac number, because 221070605 - 2⁴ = 221070589 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19091 + ... + 28400.

It is an arithmetic number, because the mean of its divisors is an integer number (13535220).

Almost surely, 2^221070605 is an apocalyptic number.

It is an amenable number.

221070605 is a deficient number, since it is larger than the sum of its proper divisors (103774675).

221070605 is a wasteful number, since it uses less digits than its factorization.

221070605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47529 (or 47522 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 221070605 is about 14868.4432608125. The cubic root of 221070605 is about 604.6587379416.

The spelling of 221070605 in words is "two hundred twenty-one million, seventy thousand, six hundred five".