23231605 has 8 divisors (see below), whose sum is σ = 29517912. Its totient is φ = 17491968.

The previous prime is 23231591. The next prime is 23231627. The reversal of 23231605 is 50613232.

It can be written as a sum of positive squares in 4 ways, for example, as 3526884 + 19704721 = 1878^2 + 4439^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 23231605 - 2⁷ = 23231477 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 7 ways as a sum of consecutive naturals, for example, 136572 + ... + 136741.

It is an arithmetic number, because the mean of its divisors is an integer number (3689739).

Almost surely, 2^23231605 is an apocalyptic number.

It is an amenable number.

23231605 is a deficient number, since it is larger than the sum of its proper divisors (6286307).

23231605 is a wasteful number, since it uses less digits than its factorization.

23231605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273335.

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

The square root of 23231605 is about 4819.9175304148. The cubic root of 23231605 is about 285.3380824257.

Adding to 23231605 its reverse (50613232), we get a palindrome (73844837).

The spelling of 23231605 in words is "twenty-three million, two hundred thirty-one thousand, six hundred five".