231623985 has 8 divisors (see below), whose sum is σ = 370598400. Its totient is φ = 123532784.

The previous prime is 231623983. The next prime is 231623989. The reversal of 231623985 is 589326132.

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 231623985 - 2¹ = 231623983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231623983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7720785 + ... + 7720814.

It is an arithmetic number, because the mean of its divisors is an integer number (46324800).

Almost surely, 2^231623985 is an apocalyptic number.

It is an amenable number.

231623985 is a deficient number, since it is larger than the sum of its proper divisors (138974415).

231623985 is a wasteful number, since it uses less digits than its factorization.

231623985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15441607.

The product of its digits is 77760, while the sum is 39.

The square root of 231623985 is about 15219.1979092198. The cubic root of 231623985 is about 614.1312209152.

The spelling of 231623985 in words is "two hundred thirty-one million, six hundred twenty-three thousand, nine hundred eighty-five".