2193851 has 6 divisors (see below), whose sum is σ = 2411556. Its totient is φ = 1994300.

The previous prime is 2193847. The next prime is 2193853. The reversal of 2193851 is 1583912.

It is not a de Polignac number, because 2193851 - 2² = 2193847 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2193853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8945 + ... + 9186.

It is an arithmetic number, because the mean of its divisors is an integer number (401926).

2^2193851 is an apocalyptic number.

2193851 is a deficient number, since it is larger than the sum of its proper divisors (217705).

2193851 is a wasteful number, since it uses less digits than its factorization.

2193851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18153 (or 18142 counting only the distinct ones).

The product of its digits is 2160, while the sum is 29.

The square root of 2193851 is about 1481.1654195261. The cubic root of 2193851 is about 129.9378598480.

The spelling of 2193851 in words is "two million, one hundred ninety-three thousand, eight hundred fifty-one".