263528563 has 4 divisors (see below), whose sum is σ = 264137608. Its totient is φ = 262919520.

The previous prime is 263528521. The next prime is 263528581. The reversal of 263528563 is 365825362.

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 263528563 - 2¹³ = 263520371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263528513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303873 + ... + 304738.

It is an arithmetic number, because the mean of its divisors is an integer number (66034402).

Almost surely, 2^263528563 is an apocalyptic number.

263528563 is a deficient number, since it is larger than the sum of its proper divisors (609045).

263528563 is an equidigital number, since it uses as much as digits as its factorization.

263528563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609044.

The product of its digits is 259200, while the sum is 40.

The square root of 263528563 is about 16233.5628560092. The cubic root of 263528563 is about 641.1247823220.

The spelling of 263528563 in words is "two hundred sixty-three million, five hundred twenty-eight thousand, five hundred sixty-three".