229621 has 4 divisors (see below), whose sum is σ = 262432. Its totient is φ = 196812.

The previous prime is 229613. The next prime is 229627. The reversal of 229621 is 126922.

It is a happy number.

229621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 229621 - 2³ = 229613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 229592 and 229601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229627) 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, 16395 + ... + 16408.

It is an arithmetic number, because the mean of its divisors is an integer number (65608).

2²²⁹⁶²¹ is an apocalyptic number.

It is an amenable number.

229621 is a deficient number, since it is larger than the sum of its proper divisors (32811).

229621 is an equidigital number, since it uses as much as digits as its factorization.

229621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32810.

The product of its digits is 432, while the sum is 22.

The square root of 229621 is about 479.1878546040. The cubic root of 229621 is about 61.2355845570.

The spelling of 229621 in words is "two hundred twenty-nine thousand, six hundred twenty-one".