263056111331 has 4 divisors (see below), whose sum is σ = 283291196832. Its totient is φ = 242821025832.

The previous prime is 263056111327. The next prime is 263056111343. The reversal of 263056111331 is 133111650362.

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 263056111331 - 2² = 263056111327 is a prime.

It is a super-2 number, since 2×263056111331² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263056111321) 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, 10117542731 + ... + 10117542756.

It is an arithmetic number, because the mean of its divisors is an integer number (70822799208).

Almost surely, 2^263056111331 is an apocalyptic number.

263056111331 is a deficient number, since it is larger than the sum of its proper divisors (20235085501).

263056111331 is a wasteful number, since it uses less digits than its factorization.

263056111331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20235085500.

The product of its (nonzero) digits is 9720, while the sum is 32.

Adding to 263056111331 its reverse (133111650362), we get a palindrome (396167761693).

The spelling of 263056111331 in words is "two hundred sixty-three billion, fifty-six million, one hundred eleven thousand, three hundred thirty-one".