2815319321 has 2 divisors, whose sum is σ = 2815319322. Its totient is φ = 2815319320.

The previous prime is 2815319303. The next prime is 2815319369. The reversal of 2815319321 is 1239135182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2762974096 + 52345225 = 52564^2 + 7235^2 .

It is a cyclic number.

It is not a de Polignac number, because 2815319321 - 2¹⁴ = 2815302937 is a prime.

It is not a weakly prime, because it can be changed into another prime (2815319621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1407659660 + 1407659661.

It is an arithmetic number, because the mean of its divisors is an integer number (1407659661).

Almost surely, 2^2815319321 is an apocalyptic number.

It is an amenable number.

2815319321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2815319321 is an equidigital number, since it uses as much as digits as its factorization.

2815319321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 35.

The square root of 2815319321 is about 53059.5827443074. The cubic root of 2815319321 is about 1412.0255449439.

It can be divided in two parts, 28153 and 19321, that added together give a palindrome (47474).

The spelling of 2815319321 in words is "two billion, eight hundred fifteen million, three hundred nineteen thousand, three hundred twenty-one".