2193812 has 6 divisors (see below), whose sum is σ = 3839178. Its totient is φ = 1096904.

The previous prime is 2193803. The next prime is 2193827. The reversal of 2193812 is 2183912.

It can be written as a sum of positive squares in only one way, i.e., 1336336 + 857476 = 1156^2 + 926^2 .

It is a super-2 number, since 2×2193812² = 9625622182688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274223 + ... + 274230.

It is an arithmetic number, because the mean of its divisors is an integer number (639863).

2^2193812 is an apocalyptic number.

It is an amenable number.

2193812 is a deficient number, since it is larger than the sum of its proper divisors (1645366).

2193812 is a wasteful number, since it uses less digits than its factorization.

2193812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548457 (or 548455 counting only the distinct ones).

The product of its digits is 864, while the sum is 26.

The square root of 2193812 is about 1481.1522541589. The cubic root of 2193812 is about 129.9370898768.

The spelling of 2193812 in words is "two million, one hundred ninety-three thousand, eight hundred twelve".