229531 has 4 divisors (see below), whose sum is σ = 232200. Its totient is φ = 226864.

The previous prime is 229529. The next prime is 229547. The reversal of 229531 is 135922.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135922 = 2 ⋅67961.

It is a cyclic number.

It is not a de Polignac number, because 229531 - 2¹ = 229529 is a prime.

It is a super-2 number, since 2×229531² = 105368959922, which contains 22 as substring.

It is a Duffinian number.

229531 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (229561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1201 + ... + 1378.

It is an arithmetic number, because the mean of its divisors is an integer number (58050).

2²²⁹⁵³¹ is an apocalyptic number.

229531 is a deficient number, since it is larger than the sum of its proper divisors (2669).

229531 is an equidigital number, since it uses as much as digits as its factorization.

229531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2668.

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

The square root of 229531 is about 479.0939365093. The cubic root of 229531 is about 61.2275830780.

The spelling of 229531 in words is "two hundred twenty-nine thousand, five hundred thirty-one".