229521 has 4 divisors (see below), whose sum is σ = 306032. Its totient is φ = 153012.

The previous prime is 229519. The next prime is 229529. The reversal of 229521 is 125922.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 229521 - 2¹ = 229519 is a prime.

It is a D-number.

It is a Duffinian number.

229521 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (229529) 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, 38251 + ... + 38256.

It is an arithmetic number, because the mean of its divisors is an integer number (76508).

2²²⁹⁵²¹ is an apocalyptic number.

It is an amenable number.

229521 is a deficient number, since it is larger than the sum of its proper divisors (76511).

229521 is an equidigital number, since it uses as much as digits as its factorization.

229521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76510.

The product of its digits is 360, while the sum is 21.

The square root of 229521 is about 479.0835000290. The cubic root of 229521 is about 61.2266938957.

The spelling of 229521 in words is "two hundred twenty-nine thousand, five hundred twenty-one".