2543330561 has 2 divisors, whose sum is σ = 2543330562. Its totient is φ = 2543330560.

The previous prime is 2543330549. The next prime is 2543330567. The reversal of 2543330561 is 1650333452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1667170561 + 876160000 = 40831^2 + 29600^2 .

It is a cyclic number.

It is not a de Polignac number, because 2543330561 - 2⁶ = 2543330497 is a prime.

It is not a weakly prime, because it can be changed into another prime (2543330567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1271665280 + 1271665281.

It is an arithmetic number, because the mean of its divisors is an integer number (1271665281).

Almost surely, 2^2543330561 is an apocalyptic number.

It is an amenable number.

2543330561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2543330561 is an equidigital number, since it uses as much as digits as its factorization.

2543330561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 32.

The square root of 2543330561 is about 50431.4441692879. Note that the first 3 decimals coincide. The cubic root of 2543330561 is about 1365.0050872178.

The spelling of 2543330561 in words is "two billion, five hundred forty-three million, three hundred thirty thousand, five hundred sixty-one".