229865129 has 4 divisors (see below), whose sum is σ = 247547076. Its totient is φ = 212183184.

The previous prime is 229865117. The next prime is 229865159. The reversal of 229865129 is 921568922.

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 27457600 + 202407529 = 5240^2 + 14227^2 .

It is a cyclic number.

It is not a de Polignac number, because 229865129 - 2¹⁶ = 229799593 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 229865129.

It is not an unprimeable number, because it can be changed into a prime (229865159) 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, 8840954 + ... + 8840979.

It is an arithmetic number, because the mean of its divisors is an integer number (61886769).

Almost surely, 2^229865129 is an apocalyptic number.

It is an amenable number.

229865129 is a deficient number, since it is larger than the sum of its proper divisors (17681947).

229865129 is a wasteful number, since it uses less digits than its factorization.

229865129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17681946.

The product of its digits is 155520, while the sum is 44.

The square root of 229865129 is about 15161.3036708589. The cubic root of 229865129 is about 612.5727840204.

The spelling of 229865129 in words is "two hundred twenty-nine million, eight hundred sixty-five thousand, one hundred twenty-nine".