229611491 has 4 divisors (see below), whose sum is σ = 229917984. Its totient is φ = 229305000.

The previous prime is 229611463. The next prime is 229611493. The reversal of 229611491 is 194116922.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 194116922 = 2 ⋅97058461.

It is a cyclic number.

It is not a de Polignac number, because 229611491 - 2¹⁰ = 229610467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (229611493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152120 + ... + 153621.

It is an arithmetic number, because the mean of its divisors is an integer number (57479496).

Almost surely, 2^229611491 is an apocalyptic number.

229611491 is a deficient number, since it is larger than the sum of its proper divisors (306493).

229611491 is an equidigital number, since it uses as much as digits as its factorization.

229611491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306492.

The product of its digits is 7776, while the sum is 35.

The square root of 229611491 is about 15152.9367120700. The cubic root of 229611491 is about 612.3473925508.

The spelling of 229611491 in words is "two hundred twenty-nine million, six hundred eleven thousand, four hundred ninety-one".