2543201009 has 2 divisors, whose sum is σ = 2543201010. Its totient is φ = 2543201008.

The previous prime is 2543200993. The next prime is 2543201021. The reversal of 2543201009 is 9001023452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2364390625 + 178810384 = 48625^2 + 13372^2 .

It is a cyclic number.

It is not a de Polignac number, because 2543201009 - 2⁴ = 2543200993 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2543201029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1271600504 + 1271600505.

It is an arithmetic number, because the mean of its divisors is an integer number (1271600505).

Almost surely, 2^2543201009 is an apocalyptic number.

It is an amenable number.

2543201009 is a deficient number, since it is larger than the sum of its proper divisors (1).

2543201009 is an equidigital number, since it uses as much as digits as its factorization.

2543201009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 2543201009 is about 50430.1597161857. The cubic root of 2543201009 is about 1364.9819099787.

The spelling of 2543201009 in words is "two billion, five hundred forty-three million, two hundred one thousand, nine".