233920665 has 72 divisors (see below), whose sum is σ = 453233664. Its totient is φ = 110678400.

The previous prime is 233920639. The next prime is 233920669. The reversal of 233920665 is 566029332.

It is not a de Polignac number, because 233920665 - 2¹⁸ = 233658521 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (233920669) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1841832 + ... + 1841958.

It is an arithmetic number, because the mean of its divisors is an integer number (6294912).

Almost surely, 2^233920665 is an apocalyptic number.

It is an amenable number.

233920665 is a deficient number, since it is larger than the sum of its proper divisors (219312999).

233920665 is a wasteful number, since it uses less digits than its factorization.

233920665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271 (or 207 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

The square root of 233920665 is about 15294.4651753502. The cubic root of 233920665 is about 616.1543656891.

Adding to 233920665 its reverse (566029332), we get a palindrome (799949997).

The spelling of 233920665 in words is "two hundred thirty-three million, nine hundred twenty thousand, six hundred sixty-five".