231023605 has 4 divisors (see below), whose sum is σ = 277228332. Its totient is φ = 184818880.

The previous prime is 231023587. The next prime is 231023621. The reversal of 231023605 is 506320132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 95394289 + 135629316 = 9767^2 + 11646^2 .

It is not a de Polignac number, because 231023605 - 2¹⁷ = 230892533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23102356 + ... + 23102365.

It is an arithmetic number, because the mean of its divisors is an integer number (69307083).

Almost surely, 2^231023605 is an apocalyptic number.

It is an amenable number.

231023605 is a deficient number, since it is larger than the sum of its proper divisors (46204727).

231023605 is an equidigital number, since it uses as much as digits as its factorization.

231023605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46204726.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 231023605 is about 15199.4606812216. The cubic root of 231023605 is about 613.6001430207.

Adding to 231023605 its reverse (506320132), we get a palindrome (737343737).

The spelling of 231023605 in words is "two hundred thirty-one million, twenty-three thousand, six hundred five".