2643145321 has 2 divisors, whose sum is σ = 2643145322. Its totient is φ = 2643145320.

The previous prime is 2643145313. The next prime is 2643145333. The reversal of 2643145321 is 1235413462.

2643145321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1685923600 + 957221721 = 41060^2 + 30939^2 .

It is a cyclic number.

It is not a de Polignac number, because 2643145321 - 2³ = 2643145313 is a prime.

It is not a weakly prime, because it can be changed into another prime (2643145301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1321572660 + 1321572661.

It is an arithmetic number, because the mean of its divisors is an integer number (1321572661).

Almost surely, 2^2643145321 is an apocalyptic number.

It is an amenable number.

2643145321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2643145321 is an equidigital number, since it uses as much as digits as its factorization.

2643145321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 31.

The square root of 2643145321 is about 51411.5290669321. The cubic root of 2643145321 is about 1382.6333044127.

Adding to 2643145321 its reverse (1235413462), we get a palindrome (3878558783).

The spelling of 2643145321 in words is "two billion, six hundred forty-three million, one hundred forty-five thousand, three hundred twenty-one".