229865161 has 4 divisors (see below), whose sum is σ = 230154372. Its totient is φ = 229575952.

The previous prime is 229865159. The next prime is 229865213. The reversal of 229865161 is 161568922.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 150209536 + 79655625 = 12256^2 + 8925^2 .

It is a cyclic number.

It is not a de Polignac number, because 229865161 - 2¹ = 229865159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (229865561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143410 + ... + 145003.

It is an arithmetic number, because the mean of its divisors is an integer number (57538593).

Almost surely, 2^229865161 is an apocalyptic number.

It is an amenable number.

229865161 is a deficient number, since it is larger than the sum of its proper divisors (289211).

229865161 is an equidigital number, since it uses as much as digits as its factorization.

229865161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289210.

The product of its digits is 51840, while the sum is 40.

The square root of 229865161 is about 15161.3047261771. The cubic root of 229865161 is about 612.5728124462.

The spelling of 229865161 in words is "two hundred twenty-nine million, eight hundred sixty-five thousand, one hundred sixty-one".