2172198 has 16 divisors (see below), whose sum is σ = 4965120. Its totient is φ = 620616.

The previous prime is 2172197. The next prime is 2172211. The reversal of 2172198 is 8912712.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25818 + ... + 25901.

It is an arithmetic number, because the mean of its divisors is an integer number (310320).

2^2172198 is an apocalyptic number.

2172198 is an abundant number, since it is smaller than the sum of its proper divisors (2792922).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2172198 is a wasteful number, since it uses less digits than its factorization.

2172198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51731.

The product of its digits is 2016, while the sum is 30.

The square root of 2172198 is about 1473.8378472546. The cubic root of 2172198 is about 129.5089562139.

It can be divided in two parts, 217 and 2198, that added together give a triangular number (2415 = T₆₉).

The spelling of 2172198 in words is "two million, one hundred seventy-two thousand, one hundred ninety-eight".