229478261 has 4 divisors (see below), whose sum is σ = 229552812. Its totient is φ = 229403712.

The previous prime is 229478239. The next prime is 229478267. The reversal of 229478261 is 162874922.

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 157126225 + 72352036 = 12535^2 + 8506^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-229478261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229478267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32450 + ... + 38883.

It is an arithmetic number, because the mean of its divisors is an integer number (57388203).

Almost surely, 2^229478261 is an apocalyptic number.

It is an amenable number.

229478261 is a deficient number, since it is larger than the sum of its proper divisors (74551).

229478261 is an equidigital number, since it uses as much as digits as its factorization.

229478261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74550.

The product of its digits is 96768, while the sum is 41.

The square root of 229478261 is about 15148.5398966369. The cubic root of 229478261 is about 612.2289332828.

The spelling of 229478261 in words is "two hundred twenty-nine million, four hundred seventy-eight thousand, two hundred sixty-one".