231324505 has 8 divisors (see below), whose sum is σ = 282140424. Its totient is φ = 182025600.

The previous prime is 231324479. The next prime is 231324557. The reversal of 231324505 is 505423132.

It can be written as a sum of positive squares in 4 ways, for example, as 25918281 + 205406224 = 5091^2 + 14332^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231324505 - 2⁷ = 231324377 is a prime.

It is a super-2 number, since 2×231324505² = 107022053226990050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231324505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 378916 + ... + 379525.

It is an arithmetic number, because the mean of its divisors is an integer number (35267553).

Almost surely, 2^231324505 is an apocalyptic number.

It is an amenable number.

231324505 is a deficient number, since it is larger than the sum of its proper divisors (50815919).

231324505 is an equidigital number, since it uses as much as digits as its factorization.

231324505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758507.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 231324505 is about 15209.3558377730. The cubic root of 231324505 is about 613.8664248753.

Adding to 231324505 its reverse (505423132), we get a palindrome (736747637).

The spelling of 231324505 in words is "two hundred thirty-one million, three hundred twenty-four thousand, five hundred five".