221107393 has 8 divisors (see below), whose sum is σ = 238327488. Its totient is φ = 203917584.

The previous prime is 221107387. The next prime is 221107409. The reversal of 221107393 is 393701122.

221107393 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 not a de Polignac number, because 221107393 - 2⁹ = 221106881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221107343) 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, 8946 + ... + 22852.

It is an arithmetic number, because the mean of its divisors is an integer number (29790936).

Almost surely, 2^221107393 is an apocalyptic number.

It is an amenable number.

221107393 is a deficient number, since it is larger than the sum of its proper divisors (17220095).

221107393 is a wasteful number, since it uses less digits than its factorization.

221107393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15143.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 221107393 is about 14869.6803260864. The cubic root of 221107393 is about 604.6922761739.

The spelling of 221107393 in words is "two hundred twenty-one million, one hundred seven thousand, three hundred ninety-three".