105220172 has 12 divisors (see below), whose sum is σ = 184479456. Its totient is φ = 52511760.

The previous prime is 105220153. The next prime is 105220177. The reversal of 105220172 is 271022501.

It is a super-2 number, since 2×105220172² = 22142569191419168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105220177) 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, 22148 + ... + 26475.

It is an arithmetic number, because the mean of its divisors is an integer number (15373288).

Almost surely, 2^105220172 is an apocalyptic number.

It is an amenable number.

105220172 is a deficient number, since it is larger than the sum of its proper divisors (79259284).

105220172 is a wasteful number, since it uses less digits than its factorization.

105220172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49168 (or 49166 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 105220172 is about 10257.6884335605. The cubic root of 105220172 is about 472.0989151594.

Adding to 105220172 its reverse (271022501), we get a palindrome (376242673).

The spelling of 105220172 in words is "one hundred five million, two hundred twenty thousand, one hundred seventy-two".