2197812 has 12 divisors (see below), whose sum is σ = 5128256. Its totient is φ = 732600.

The previous prime is 2197799. The next prime is 2197847. The reversal of 2197812 is 2187912.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 2197812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91564 + ... + 91587.

2^2197812 is an apocalyptic number.

It is an amenable number.

2197812 is an abundant number, since it is smaller than the sum of its proper divisors (2930444).

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

2197812 is a wasteful number, since it uses less digits than its factorization.

2197812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183158 (or 183156 counting only the distinct ones).

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

The square root of 2197812 is about 1482.5019392905. The cubic root of 2197812 is about 130.0160138064.

The spelling of 2197812 in words is "two million, one hundred ninety-seven thousand, eight hundred twelve".