263223361 has 4 divisors (see below), whose sum is σ = 263680132. Its totient is φ = 262766592.

The previous prime is 263223347. The next prime is 263223379. The reversal of 263223361 is 163322362.

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

It can be written as a sum of positive squares in 2 ways, for example, as 125888400 + 137334961 = 11220^2 + 11719^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-263223361 is a prime.

It is a super-2 number, since 2×263223361² = 138573075552272642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263223391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227520 + ... + 228673.

It is an arithmetic number, because the mean of its divisors is an integer number (65920033).

Almost surely, 2^263223361 is an apocalyptic number.

It is an amenable number.

263223361 is a deficient number, since it is larger than the sum of its proper divisors (456771).

263223361 is an equidigital number, since it uses as much as digits as its factorization.

263223361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456770.

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

The square root of 263223361 is about 16224.1597933452. The cubic root of 263223361 is about 640.8771834144.

Subtracting from 263223361 its reverse (163322362), we obtain a palindrome (99900999).

The spelling of 263223361 in words is "two hundred sixty-three million, two hundred twenty-three thousand, three hundred sixty-one".