2193445 has 8 divisors (see below), whose sum is σ = 2646936. Its totient is φ = 1744896.

The previous prime is 2193439. The next prime is 2193449. The reversal of 2193445 is 5443912.

It can be written as a sum of positive squares in 4 ways, for example, as 349281 + 1844164 = 591^2 + 1358^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2193445 - 2⁵ = 2193413 is a prime.

It is a super-2 number, since 2×2193445² = 9622401936050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2193449) 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, 172 + ... + 2101.

It is an arithmetic number, because the mean of its divisors is an integer number (330867).

2^2193445 is an apocalyptic number.

It is an amenable number.

2193445 is a deficient number, since it is larger than the sum of its proper divisors (453491).

2193445 is a wasteful number, since it uses less digits than its factorization.

2193445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2471.

The product of its digits is 4320, while the sum is 28.

The square root of 2193445 is about 1481.0283589452. The cubic root of 2193445 is about 129.9298438029.

The spelling of 2193445 in words is "two million, one hundred ninety-three thousand, four hundred forty-five".