2321219917 has 4 divisors (see below), whose sum is σ = 2325658720. Its totient is φ = 2316781116.

The previous prime is 2321219903. The next prime is 2321219977. The reversal of 2321219917 is 7199121232.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2321219917 - 2¹¹ = 2321217869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2321219977) 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 3 ways as a sum of consecutive naturals, for example, 2218617 + ... + 2219662.

It is an arithmetic number, because the mean of its divisors is an integer number (581414680).

Almost surely, 2^2321219917 is an apocalyptic number.

It is an amenable number.

2321219917 is a deficient number, since it is larger than the sum of its proper divisors (4438803).

2321219917 is an equidigital number, since it uses as much as digits as its factorization.

2321219917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4438802.

The product of its digits is 13608, while the sum is 37.

The square root of 2321219917 is about 48179.0402249775. The cubic root of 2321219917 is about 1324.0531822770.

The spelling of 2321219917 in words is "two billion, three hundred twenty-one million, two hundred nineteen thousand, nine hundred seventeen".