2164465321 has 2 divisors, whose sum is σ = 2164465322. Its totient is φ = 2164465320.

The previous prime is 2164465319. The next prime is 2164465343. The reversal of 2164465321 is 1235644612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1740558400 + 423906921 = 41720^2 + 20589^2 .

It is a cyclic number.

It is not a de Polignac number, because 2164465321 - 2¹ = 2164465319 is a prime.

Together with 2164465319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2164465421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1082232660 + 1082232661.

It is an arithmetic number, because the mean of its divisors is an integer number (1082232661).

Almost surely, 2^2164465321 is an apocalyptic number.

It is an amenable number.

2164465321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2164465321 is an equidigital number, since it uses as much as digits as its factorization.

2164465321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 34.

The square root of 2164465321 is about 46523.8145577080. The cubic root of 2164465321 is about 1293.5509640958.

The spelling of 2164465321 in words is "two billion, one hundred sixty-four million, four hundred sixty-five thousand, three hundred twenty-one".