263441563 has 24 divisors (see below), whose sum is σ = 345348864. Its totient is φ = 196339440.

The previous prime is 263441551. The next prime is 263441611. The reversal of 263441563 is 365144362.

It is a de Polignac number, because none of the positive numbers 2^k-263441563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (263441663) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12720 + ... + 26242.

It is an arithmetic number, because the mean of its divisors is an integer number (14389536).

Almost surely, 2^263441563 is an apocalyptic number.

263441563 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

263441563 is a deficient number, since it is larger than the sum of its proper divisors (81907301).

263441563 is a wasteful number, since it uses less digits than its factorization.

263441563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13575 (or 13564 counting only the distinct ones).

The product of its digits is 51840, while the sum is 34.

The square root of 263441563 is about 16230.8830012418. The cubic root of 263441563 is about 641.0542219817.

The spelling of 263441563 in words is "two hundred sixty-three million, four hundred forty-one thousand, five hundred sixty-three".