220100173 has 4 divisors (see below), whose sum is σ = 233047260. Its totient is φ = 207153088.

The previous prime is 220100171. The next prime is 220100291. The reversal of 220100173 is 371001022.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 185313769 + 34786404 = 13613^2 + 5898^2 .

It is a cyclic number.

It is not a de Polignac number, because 220100173 - 2¹ = 220100171 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 (220100171) 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, 6473518 + ... + 6473551.

It is an arithmetic number, because the mean of its divisors is an integer number (58261815).

Almost surely, 2^220100173 is an apocalyptic number.

It is an amenable number.

220100173 is a deficient number, since it is larger than the sum of its proper divisors (12947087).

220100173 is a wasteful number, since it uses less digits than its factorization.

220100173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12947086.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 220100173 is about 14835.7734210253. The cubic root of 220100173 is about 603.7726848436.

Adding to 220100173 its reverse (371001022), we get a palindrome (591101195).

The spelling of 220100173 in words is "two hundred twenty million, one hundred thousand, one hundred seventy-three".