23081665 has 8 divisors (see below), whose sum is σ = 29327400. Its totient is φ = 17379072.

The previous prime is 23081657. The next prime is 23081677. The reversal of 23081665 is 56618032.

It can be written as a sum of positive squares in 4 ways, for example, as 8573184 + 14508481 = 2928^2 + 3809^2 .

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 23081665 - 2³ = 23081657 is a prime.

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, 135690 + ... + 135859.

It is an arithmetic number, because the mean of its divisors is an integer number (3665925).

Almost surely, 2^23081665 is an apocalyptic number.

It is an amenable number.

23081665 is a deficient number, since it is larger than the sum of its proper divisors (6245735).

23081665 is a wasteful number, since it uses less digits than its factorization.

23081665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271571.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 23081665 is about 4804.3381438030. The cubic root of 23081665 is about 284.7228864849.

Adding to 23081665 its reverse (56618032), we get a palindrome (79699697).

The spelling of 23081665 in words is "twenty-three million, eighty-one thousand, six hundred sixty-five".