231529 has 2 divisors, whose sum is σ = 231530. Its totient is φ = 231528.

The previous prime is 231503. The next prime is 231533. The reversal of 231529 is 925132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204304 + 27225 = 452^2 + 165^2 .

It is a cyclic number.

It is not a de Polignac number, because 231529 - 2⁹ = 231017 is a prime.

It is not a weakly prime, because it can be changed into another prime (231559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115764 + 115765.

It is an arithmetic number, because the mean of its divisors is an integer number (115765).

2²³¹⁵²⁹ is an apocalyptic number.

It is an amenable number.

231529 is a deficient number, since it is larger than the sum of its proper divisors (1).

231529 is an equidigital number, since it uses as much as digits as its factorization.

231529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540, while the sum is 22.

The square root of 231529 is about 481.1746044837. The cubic root of 231529 is about 61.4047261231.

The spelling of 231529 in words is "two hundred thirty-one thousand, five hundred twenty-nine".