263552563 has 4 divisors (see below), whose sum is σ = 264554928. Its totient is φ = 262550200.

The previous prime is 263552543. The next prime is 263552579. The reversal of 263552563 is 365255362.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 263552563 - 2¹³ = 263544371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263552503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500788 + ... + 501313.

It is an arithmetic number, because the mean of its divisors is an integer number (66138732).

Almost surely, 2^263552563 is an apocalyptic number.

263552563 is a deficient number, since it is larger than the sum of its proper divisors (1002365).

263552563 is a wasteful number, since it uses less digits than its factorization.

263552563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002364.

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

The square root of 263552563 is about 16234.3020484405. The cubic root of 263552563 is about 641.1442445105.

It can be divided in two parts, 263 and 552563, that added together give a triangular number (552826 = T₁₀₅₁).

The spelling of 263552563 in words is "two hundred sixty-three million, five hundred fifty-two thousand, five hundred sixty-three".