2321500409 has 2 divisors, whose sum is σ = 2321500410. Its totient is φ = 2321500408.

The previous prime is 2321500403. The next prime is 2321500451. The reversal of 2321500409 is 9040051232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1993890409 + 327610000 = 44653^2 + 18100^2 .

It is a cyclic number.

It is not a de Polignac number, because 2321500409 - 2²⁴ = 2304723193 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2321500403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1160750204 + 1160750205.

It is an arithmetic number, because the mean of its divisors is an integer number (1160750205).

Almost surely, 2^2321500409 is an apocalyptic number.

It is an amenable number.

2321500409 is a deficient number, since it is larger than the sum of its proper divisors (1).

2321500409 is an equidigital number, since it uses as much as digits as its factorization.

2321500409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 2321500409 is about 48181.9510709145. The cubic root of 2321500409 is about 1324.1065121898.

The spelling of 2321500409 in words is "two billion, three hundred twenty-one million, five hundred thousand, four hundred nine".