263213263 has 4 divisors (see below), whose sum is σ = 263789680. Its totient is φ = 262636848.

The previous prime is 263213257. The next prime is 263213267. The reversal of 263213263 is 362312362.

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 263213263 - 2¹³ = 263205071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263213267) 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, 287523 + ... + 288436.

It is an arithmetic number, because the mean of its divisors is an integer number (65947420).

Almost surely, 2^263213263 is an apocalyptic number.

263213263 is a deficient number, since it is larger than the sum of its proper divisors (576417).

263213263 is an equidigital number, since it uses as much as digits as its factorization.

263213263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576416.

The product of its digits is 7776, while the sum is 28.

The square root of 263213263 is about 16223.8485878043. The cubic root of 263213263 is about 640.8689880165.

Subtracting 263213263 from its reverse (362312362), we obtain a palindrome (99099099).

It can be divided in two parts, 26321 and 3263, that added together give a square (29584 = 172²).

The spelling of 263213263 in words is "two hundred sixty-three million, two hundred thirteen thousand, two hundred sixty-three".