228144847 has 4 divisors (see below), whose sum is σ = 260736976. Its totient is φ = 195552720.

The previous prime is 228144823. The next prime is 228144857. The reversal of 228144847 is 748441822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 748441822 = 2 ⋅374220911.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228144847 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 (228144817) 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, 16296054 + ... + 16296067.

It is an arithmetic number, because the mean of its divisors is an integer number (65184244).

Almost surely, 2^228144847 is an apocalyptic number.

228144847 is a deficient number, since it is larger than the sum of its proper divisors (32592129).

228144847 is an equidigital number, since it uses as much as digits as its factorization.

228144847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32592128.

The product of its digits is 114688, while the sum is 40.

The square root of 228144847 is about 15104.4644724664. The cubic root of 228144847 is about 611.0408164789.

The spelling of 228144847 in words is "two hundred twenty-eight million, one hundred forty-four thousand, eight hundred forty-seven".