2193742321 has 8 divisors (see below), whose sum is σ = 2275343784. Its totient is φ = 2113315200.

The previous prime is 2193742319. The next prime is 2193742333. The reversal of 2193742321 is 1232473912.

It can be written as a sum of positive squares in 4 ways, for example, as 1404750400 + 788991921 = 37480^2 + 28089^2 .

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 2193742321 - 2¹ = 2193742319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2193752321) 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, 289780 + ... + 297253.

It is an arithmetic number, because the mean of its divisors is an integer number (284417973).

Almost surely, 2^2193742321 is an apocalyptic number.

It is an amenable number.

2193742321 is a deficient number, since it is larger than the sum of its proper divisors (81601463).

2193742321 is a wasteful number, since it uses less digits than its factorization.

2193742321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587171.

The product of its digits is 18144, while the sum is 34.

The square root of 2193742321 is about 46837.4030129767. The cubic root of 2193742321 is about 1299.3571419184.

The spelling of 2193742321 in words is "two billion, one hundred ninety-three million, seven hundred forty-two thousand, three hundred twenty-one".