221106673 has 4 divisors (see below), whose sum is σ = 221164020. Its totient is φ = 221049328.

The previous prime is 221106671. The next prime is 221106679. The reversal of 221106673 is 376601122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 376601122 = 2 ⋅188300561.

It can be written as a sum of positive squares in 2 ways, for example, as 172344384 + 48762289 = 13128^2 + 6983^2 .

It is a cyclic number.

It is not a de Polignac number, because 221106673 - 2¹ = 221106671 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221106671) 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, 22438 + ... + 30751.

It is an arithmetic number, because the mean of its divisors is an integer number (55291005).

Almost surely, 2^221106673 is an apocalyptic number.

It is an amenable number.

221106673 is a deficient number, since it is larger than the sum of its proper divisors (57347).

221106673 is an equidigital number, since it uses as much as digits as its factorization.

221106673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57346.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 221106673 is about 14869.6561157278. The cubic root of 221106673 is about 604.6916198127.

Adding to 221106673 its reverse (376601122), we get a palindrome (597707795).

The spelling of 221106673 in words is "two hundred twenty-one million, one hundred six thousand, six hundred seventy-three".