229918 has 16 divisors (see below), whose sum is σ = 383040. Its totient is φ = 102816.

The previous prime is 229903. The next prime is 229937. The reversal of 229918 is 819922.

It is a self number, because there is not a number n which added to its sum of digits gives 229918.

It is a congruent number.

It is an unprimeable number.

229918 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 843 + ... + 1081.

It is an arithmetic number, because the mean of its divisors is an integer number (23940).

2²²⁹⁹¹⁸ is an apocalyptic number.

229918 is a deficient number, since it is larger than the sum of its proper divisors (153122).

229918 is a wasteful number, since it uses less digits than its factorization.

229918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291.

The product of its digits is 2592, while the sum is 31.

The square root of 229918 is about 479.4976538003. The cubic root of 229918 is about 61.2619746128.

The spelling of 229918 in words is "two hundred twenty-nine thousand, nine hundred eighteen".