229491 has 12 divisors (see below), whose sum is σ = 339768. Its totient is φ = 149184.

The previous prime is 229487. The next prime is 229499. The reversal of 229491 is 194922.

It is not a de Polignac number, because 229491 - 2² = 229487 is a prime.

It is a super-2 number, since 2×229491² = 105332238162, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (229499) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91 + ... + 683.

It is an arithmetic number, because the mean of its divisors is an integer number (28314).

2²²⁹⁴⁹¹ is an apocalyptic number.

229491 is a deficient number, since it is larger than the sum of its proper divisors (110277).

229491 is a wasteful number, since it uses less digits than its factorization.

229491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642 (or 639 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 229491 is about 479.0521892237. The cubic root of 229491 is about 61.2240261938.

It can be divided in two parts, 22 and 9491, that multiplied together give a palindrome (208802).

The spelling of 229491 in words is "two hundred twenty-nine thousand, four hundred ninety-one".