2172205 has 16 divisors (see below), whose sum is σ = 3037824. Its totient is φ = 1460160.

The previous prime is 2172197. The next prime is 2172211. The reversal of 2172205 is 5022712.

It is not a de Polignac number, because 2172205 - 2³ = 2172197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1270 + ... + 2440.

It is an arithmetic number, because the mean of its divisors is an integer number (189864).

2^2172205 is an apocalyptic number.

It is an amenable number.

2172205 is a deficient number, since it is larger than the sum of its proper divisors (865619).

2172205 is a wasteful number, since it uses less digits than its factorization.

2172205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1236.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 2172205 is about 1473.8402220051. The cubic root of 2172205 is about 129.5090953297.

Adding to 2172205 its reverse (5022712), we get a palindrome (7194917).

The spelling of 2172205 in words is "two million, one hundred seventy-two thousand, two hundred five".