231236853 has 16 divisors (see below), whose sum is σ = 311164416. Its totient is φ = 152740080.

The previous prime is 231236833. The next prime is 231236861. The reversal of 231236853 is 358632132.

It is a de Polignac number, because none of the positive numbers 2^k-231236853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231236813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 237658 + ... + 238628.

It is an arithmetic number, because the mean of its divisors is an integer number (19447776).

Almost surely, 2^231236853 is an apocalyptic number.

It is an amenable number.

231236853 is a deficient number, since it is larger than the sum of its proper divisors (79927563).

231236853 is a wasteful number, since it uses less digits than its factorization.

231236853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1624.

The product of its digits is 25920, while the sum is 33.

The square root of 231236853 is about 15206.4740489043. The cubic root of 231236853 is about 613.7888809688.

Adding to 231236853 its reverse (358632132), we get a palindrome (589868985).

The spelling of 231236853 in words is "two hundred thirty-one million, two hundred thirty-six thousand, eight hundred fifty-three".