2190804321 has 8 divisors (see below), whose sum is σ = 2929210560. Its totient is φ = 1456467152.

The previous prime is 2190804277. The next prime is 2190804323. The reversal of 2190804321 is 1234080912.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2190804321 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2190804323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1016010 + ... + 1018163.

It is an arithmetic number, because the mean of its divisors is an integer number (366151320).

Almost surely, 2^2190804321 is an apocalyptic number.

It is an amenable number.

2190804321 is a deficient number, since it is larger than the sum of its proper divisors (738406239).

2190804321 is a wasteful number, since it uses less digits than its factorization.

2190804321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2034535.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 2190804321 is about 46806.0286822114. The cubic root of 2190804321 is about 1298.7768220492.

The spelling of 2190804321 in words is "two billion, one hundred ninety million, eight hundred four thousand, three hundred twenty-one".