231533 has 2 divisors, whose sum is σ = 231534. Its totient is φ = 231532.

The previous prime is 231529. The next prime is 231547. The reversal of 231533 is 335132.

231533 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131044 + 100489 = 362^2 + 317^2 .

It is a cyclic number.

It is not a de Polignac number, because 231533 - 2² = 231529 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115766 + 115767.

It is an arithmetic number, because the mean of its divisors is an integer number (115767).

2²³¹⁵³³ is an apocalyptic number.

It is an amenable number.

231533 is a deficient number, since it is larger than the sum of its proper divisors (1).

231533 is an equidigital number, since it uses as much as digits as its factorization.

231533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 270, while the sum is 17.

The square root of 231533 is about 481.1787609610. The cubic root of 231533 is about 61.4050797397.

Adding to 231533 its reverse (335132), we get a palindrome (566665).

The spelling of 231533 in words is "two hundred thirty-one thousand, five hundred thirty-three".