229112813 has 4 divisors (see below), whose sum is σ = 229297500. Its totient is φ = 228928128.

The previous prime is 229112803. The next prime is 229112833. The reversal of 229112813 is 318211922.

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 75030244 + 154082569 = 8662^2 + 12413^2 .

It is a cyclic number.

It is not a de Polignac number, because 229112813 - 2⁶ = 229112749 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229112803) 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, 90470 + ... + 92967.

It is an arithmetic number, because the mean of its divisors is an integer number (57324375).

Almost surely, 2^229112813 is an apocalyptic number.

It is an amenable number.

229112813 is a deficient number, since it is larger than the sum of its proper divisors (184687).

229112813 is a wasteful number, since it uses less digits than its factorization.

229112813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184686.

The product of its digits is 1728, while the sum is 29.

The square root of 229112813 is about 15136.4729379073. The cubic root of 229112813 is about 611.9037656436.

The spelling of 229112813 in words is "two hundred twenty-nine million, one hundred twelve thousand, eight hundred thirteen".