263555263 has 2 divisors, whose sum is σ = 263555264. Its totient is φ = 263555262.

The previous prime is 263555261. The next prime is 263555269. The reversal of 263555263 is 362555362.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 263555263 - 2¹ = 263555261 is a prime.

It is a super-2 number, since 2×263555263² = 138922753309998338, which contains 22 as substring.

Together with 263555261, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263555261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131777631 + 131777632.

It is an arithmetic number, because the mean of its divisors is an integer number (131777632).

Almost surely, 2^263555263 is an apocalyptic number.

263555263 is a deficient number, since it is larger than the sum of its proper divisors (1).

263555263 is an equidigital number, since it uses as much as digits as its factorization.

263555263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 162000, while the sum is 37.

The square root of 263555263 is about 16234.3852054828. The cubic root of 263555263 is about 641.1464339328.

Subtracting 263555263 from its reverse (362555362), we obtain a palindrome (99000099).

The spelling of 263555263 in words is "two hundred sixty-three million, five hundred fifty-five thousand, two hundred sixty-three".