231543653 has 8 divisors (see below), whose sum is σ = 252737280. Its totient is φ = 210374080.

The previous prime is 231543649. The next prime is 231543659. The reversal of 231543653 is 356345132.

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 231543653 - 2² = 231543649 is a prime.

It is a super-2 number, since 2×231543653² = 107224926489168818, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231543659) 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, 18476 + ... + 28362.

It is an arithmetic number, because the mean of its divisors is an integer number (31592160).

Almost surely, 2^231543653 is an apocalyptic number.

It is an amenable number.

231543653 is a deficient number, since it is larger than the sum of its proper divisors (21193627).

231543653 is a wasteful number, since it uses less digits than its factorization.

231543653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12027.

The product of its digits is 32400, while the sum is 32.

The square root of 231543653 is about 15216.5585136719. The cubic root of 231543653 is about 614.0602148926.

Adding to 231543653 its reverse (356345132), we get a palindrome (587888785).

The spelling of 231543653 in words is "two hundred thirty-one million, five hundred forty-three thousand, six hundred fifty-three".