264191 has 6 divisors (see below), whose sum is σ = 272376. Its totient is φ = 256200.

The previous prime is 264179. The next prime is 264211. The reversal of 264191 is 191462.

It is a happy number.

It is not a de Polignac number, because 264191 - 2⁶ = 264127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3686 + ... + 3756.

It is an arithmetic number, because the mean of its divisors is an integer number (45396).

2²⁶⁴¹⁹¹ is an apocalyptic number.

264191 is a deficient number, since it is larger than the sum of its proper divisors (8185).

264191 is an frugal number, since it uses more digits than its factorization.

264191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 132 counting only the distinct ones).

The product of its digits is 432, while the sum is 23.

The square root of 264191 is about 513.9951361638. The cubic root of 264191 is about 64.1661535537.

The spelling of 264191 in words is "two hundred sixty-four thousand, one hundred ninety-one".