231023533 has 8 divisors (see below), whose sum is σ = 248976000. Its totient is φ = 213097008.

The previous prime is 231023519. The next prime is 231023537. The reversal of 231023533 is 335320132.

It is a happy number.

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 231023533 - 2⁹ = 231023021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231023537) 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, 14568 + ... + 25966.

It is an arithmetic number, because the mean of its divisors is an integer number (31122000).

Almost surely, 2^231023533 is an apocalyptic number.

It is an amenable number.

231023533 is a deficient number, since it is larger than the sum of its proper divisors (17952467).

231023533 is a wasteful number, since it uses less digits than its factorization.

231023533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12971.

The product of its (nonzero) digits is 1620, while the sum is 22.

The square root of 231023533 is about 15199.4583127163. The cubic root of 231023533 is about 613.6000792765.

Adding to 231023533 its reverse (335320132), we get a palindrome (566343665).

The spelling of 231023533 in words is "two hundred thirty-one million, twenty-three thousand, five hundred thirty-three".