221166613 has 8 divisors (see below), whose sum is σ = 223407296. Its totient is φ = 218937600.

The previous prime is 221166611. The next prime is 221166641. The reversal of 221166613 is 316661122.

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 221166613 - 2¹ = 221166611 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221166611) 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, 38008 + ... + 43438.

It is an arithmetic number, because the mean of its divisors is an integer number (27925912).

Almost surely, 2^221166613 is an apocalyptic number.

It is an amenable number.

221166613 is a deficient number, since it is larger than the sum of its proper divisors (2240683).

221166613 is a wasteful number, since it uses less digits than its factorization.

221166613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5835.

The product of its digits is 2592, while the sum is 28.

The square root of 221166613 is about 14871.6714931443. The cubic root of 221166613 is about 604.7462570012.

The spelling of 221166613 in words is "two hundred twenty-one million, one hundred sixty-six thousand, six hundred thirteen".