2523663281 has 2 divisors, whose sum is σ = 2523663282. Its totient is φ = 2523663280.

The previous prime is 2523663253. The next prime is 2523663287. The reversal of 2523663281 is 1823663252.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1772410000 + 751253281 = 42100^2 + 27409^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2523663281 is a prime.

It is a super-2 number, since 2×2523663281² = 12737752711735369922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2523663287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1261831640 + 1261831641.

It is an arithmetic number, because the mean of its divisors is an integer number (1261831641).

Almost surely, 2^2523663281 is an apocalyptic number.

It is an amenable number.

2523663281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2523663281 is an equidigital number, since it uses as much as digits as its factorization.

2523663281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 38.

The square root of 2523663281 is about 50236.0754936132. The cubic root of 2523663281 is about 1361.4775034364.

The spelling of 2523663281 in words is "two billion, five hundred twenty-three million, six hundred sixty-three thousand, two hundred eighty-one".