2173225 has 6 divisors (see below), whose sum is σ = 2694830. Its totient is φ = 1738560.

The previous prime is 2173219. The next prime is 2173243. The reversal of 2173225 is 5223712.

It can be written as a sum of positive squares in 3 ways, for example, as 29929 + 2143296 = 173^2 + 1464^2 .

It is not a de Polignac number, because 2173225 - 2¹⁷ = 2042153 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2173196 and 2173205.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43440 + ... + 43489.

2^2173225 is an apocalyptic number.

2173225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2173225 is a deficient number, since it is larger than the sum of its proper divisors (521605).

2173225 is an equidigital number, since it uses as much as digits as its factorization.

2173225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86939 (or 86934 counting only the distinct ones).

The product of its digits is 840, while the sum is 22.

The square root of 2173225 is about 1474.1862161884. The cubic root of 2173225 is about 129.5293633072.

Adding to 2173225 its reverse (5223712), we get a palindrome (7396937).

The spelling of 2173225 in words is "two million, one hundred seventy-three thousand, two hundred twenty-five".