263191 has 2 divisors, whose sum is σ = 263192. Its totient is φ = 263190.

The previous prime is 263183. The next prime is 263201. The reversal of 263191 is 191362.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 263191 - 2³ = 263183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131595 + 131596.

It is an arithmetic number, because the mean of its divisors is an integer number (131596).

2²⁶³¹⁹¹ is an apocalyptic number.

263191 is a deficient number, since it is larger than the sum of its proper divisors (1).

263191 is an equidigital number, since it uses as much as digits as its factorization.

263191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 22.

The square root of 263191 is about 513.0214420470. The cubic root of 263191 is about 64.0850918931.

Subtracting from 263191 its sum of digits (22), we obtain a square (263169 = 513²).

It can be divided in two parts, 263 and 191, that added together give a palindrome (454).

The spelling of 263191 in words is "two hundred sixty-three thousand, one hundred ninety-one".