263113261 has 4 divisors (see below), whose sum is σ = 274552992. Its totient is φ = 251673532.

The previous prime is 263113231. The next prime is 263113271. The reversal of 263113261 is 162311362.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 263113261 - 2¹¹ = 263111213 is a prime.

It is a super-2 number, since 2×263113261² = 138457176228108242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263113231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5719831 + ... + 5719876.

It is an arithmetic number, because the mean of its divisors is an integer number (68638248).

Almost surely, 2^263113261 is an apocalyptic number.

It is an amenable number.

263113261 is a deficient number, since it is larger than the sum of its proper divisors (11439731).

263113261 is a wasteful number, since it uses less digits than its factorization.

263113261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11439730.

The product of its digits is 1296, while the sum is 25.

The square root of 263113261 is about 16220.7663505767. The cubic root of 263113261 is about 640.7878164501.

The spelling of 263113261 in words is "two hundred sixty-three million, one hundred thirteen thousand, two hundred sixty-one".