221000093 has 4 divisors (see below), whose sum is σ = 221030460. Its totient is φ = 220969728.

The previous prime is 221000071. The next prime is 221000107. The reversal of 221000093 is 390000122.

221000093 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 68773849 + 152226244 = 8293^2 + 12338^2 .

It is a cyclic number.

It is not a de Polignac number, because 221000093 - 2⁶ = 221000029 is a prime.

It is a super-2 number, since 2×221000093² = 97682082212017298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221000053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2963 + ... + 21231.

It is an arithmetic number, because the mean of its divisors is an integer number (55257615).

Almost surely, 2^221000093 is an apocalyptic number.

It is an amenable number.

221000093 is a deficient number, since it is larger than the sum of its proper divisors (30367).

221000093 is a wasteful number, since it uses less digits than its factorization.

221000093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30366.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 221000093 is about 14866.0718752467. The cubic root of 221000093 is about 604.5944444086.

The spelling of 221000093 in words is "two hundred twenty-one million, ninety-three", and thus it is an aban number.