2544243257 has 2 divisors, whose sum is σ = 2544243258. Its totient is φ = 2544243256.

The previous prime is 2544243209. The next prime is 2544243277. The reversal of 2544243257 is 7523424452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2514420736 + 29822521 = 50144^2 + 5461^2 .

It is a cyclic number.

It is not a de Polignac number, because 2544243257 - 2¹⁸ = 2543981113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2544243257.

It is not a weakly prime, because it can be changed into another prime (2544243277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1272121628 + 1272121629.

It is an arithmetic number, because the mean of its divisors is an integer number (1272121629).

Almost surely, 2^2544243257 is an apocalyptic number.

It is an amenable number.

2544243257 is a deficient number, since it is larger than the sum of its proper divisors (1).

2544243257 is an equidigital number, since it uses as much as digits as its factorization.

2544243257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 268800, while the sum is 38.

The square root of 2544243257 is about 50440.4922359011. The cubic root of 2544243257 is about 1365.1683489536.

The spelling of 2544243257 in words is "two billion, five hundred forty-four million, two hundred forty-three thousand, two hundred fifty-seven".