263131455281 has 2 divisors, whose sum is σ = 263131455282. Its totient is φ = 263131455280.

The previous prime is 263131455277. The next prime is 263131455287. The reversal of 263131455281 is 182554131362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211063061056 + 52068394225 = 459416^2 + 228185^2 .

It is a cyclic number.

It is not a de Polignac number, because 263131455281 - 2² = 263131455277 is a prime.

It is a super-2 number, since 2×263131455281² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (263131455287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131565727640 + 131565727641.

It is an arithmetic number, because the mean of its divisors is an integer number (131565727641).

Almost surely, 2^263131455281 is an apocalyptic number.

It is an amenable number.

263131455281 is a deficient number, since it is larger than the sum of its proper divisors (1).

263131455281 is an equidigital number, since it uses as much as digits as its factorization.

263131455281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172800, while the sum is 41.

The spelling of 263131455281 in words is "two hundred sixty-three billion, one hundred thirty-one million, four hundred fifty-five thousand, two hundred eighty-one".