105220173 has 4 divisors (see below), whose sum is σ = 140293568. Its totient is φ = 70146780.

The previous prime is 105220153. The next prime is 105220177. The reversal of 105220173 is 371022501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-105220173 is a prime.

It is a super-2 number, since 2×105220173² = 22142569612299858, 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 (105220177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17536693 + ... + 17536698.

It is an arithmetic number, because the mean of its divisors is an integer number (35073392).

Almost surely, 2^105220173 is an apocalyptic number.

It is an amenable number.

105220173 is a deficient number, since it is larger than the sum of its proper divisors (35073395).

105220173 is an equidigital number, since it uses as much as digits as its factorization.

105220173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35073394.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 105220173 is about 10257.6884823044. The cubic root of 105220173 is about 472.0989166550.

Adding to 105220173 its reverse (371022501), we get a palindrome (476242674).

The spelling of 105220173 in words is "one hundred five million, two hundred twenty thousand, one hundred seventy-three".