263112431 has 2 divisors, whose sum is σ = 263112432. Its totient is φ = 263112430.

The previous prime is 263112401. The next prime is 263112467. The reversal of 263112431 is 134211362.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-263112431 is a prime.

It is a super-2 number, since 2×263112431² = 138456302693459522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 263112397 and 263112406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263112401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131556215 + 131556216.

It is an arithmetic number, because the mean of its divisors is an integer number (131556216).

Almost surely, 2^263112431 is an apocalyptic number.

263112431 is a deficient number, since it is larger than the sum of its proper divisors (1).

263112431 is an equidigital number, since it uses as much as digits as its factorization.

263112431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 23.

The square root of 263112431 is about 16220.7407660686. The cubic root of 263112431 is about 640.7871426535.

Adding to 263112431 its reverse (134211362), we get a palindrome (397323793).

The spelling of 263112431 in words is "two hundred sixty-three million, one hundred twelve thousand, four hundred thirty-one".