229661 has 4 divisors (see below), whose sum is σ = 232512. Its totient is φ = 226812.

The previous prime is 229639. The next prime is 229681. The reversal of 229661 is 166922.

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 a cyclic number.

It is not a de Polignac number, because 229661 - 2¹⁰ = 228637 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 229661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229601) 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, 1301 + ... + 1466.

It is an arithmetic number, because the mean of its divisors is an integer number (58128).

2²²⁹⁶⁶¹ is an apocalyptic number.

It is an amenable number.

229661 is a deficient number, since it is larger than the sum of its proper divisors (2851).

229661 is an equidigital number, since it uses as much as digits as its factorization.

229661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2850.

The product of its digits is 1296, while the sum is 26.

The square root of 229661 is about 479.2295900714. The cubic root of 229661 is about 61.2391400988.

The spelling of 229661 in words is "two hundred twenty-nine thousand, six hundred sixty-one".