264531 has 4 divisors (see below), whose sum is σ = 352712. Its totient is φ = 176352.

The previous prime is 264529. The next prime is 264553. The reversal of 264531 is 135462.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 264531 - 2¹ = 264529 is a prime.

It is a super-2 number, since 2×264531² = 139953299922, which contains 22 as substring.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 264498 and 264507.

It is not an unprimeable number, because it can be changed into a prime (264581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44086 + ... + 44091.

It is an arithmetic number, because the mean of its divisors is an integer number (88178).

2²⁶⁴⁵³¹ is an apocalyptic number.

264531 is a deficient number, since it is larger than the sum of its proper divisors (88181).

264531 is an equidigital number, since it uses as much as digits as its factorization.

264531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88180.

The product of its digits is 720, while the sum is 21.

The square root of 264531 is about 514.3257722495. The cubic root of 264531 is about 64.1936679152.

Adding to 264531 its reverse (135462), we get a palindrome (399993).

The spelling of 264531 in words is "two hundred sixty-four thousand, five hundred thirty-one".