228143812 has 24 divisors (see below), whose sum is σ = 444792600. Its totient is φ = 101665536.

The previous prime is 228143809. The next prime is 228143819. The reversal of 228143812 is 218341822.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 32535616 + 195608196 = 5704^2 + 13986^2 .

It is not an unprimeable number, because it can be changed into a prime (228143819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74137 + ... + 77152.

It is an arithmetic number, because the mean of its divisors is an integer number (18533025).

Almost surely, 2^228143812 is an apocalyptic number.

It is an amenable number.

228143812 is a deficient number, since it is larger than the sum of its proper divisors (216648788).

228143812 is a wasteful number, since it uses less digits than its factorization.

228143812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151335 (or 151333 counting only the distinct ones).

The product of its digits is 6144, while the sum is 31.

The square root of 228143812 is about 15104.4302110341. The cubic root of 228143812 is about 611.0398924633.

It can be divided in two parts, 22814 and 3812, that multiplied together give a palindrome (86966968).

The spelling of 228143812 in words is "two hundred twenty-eight million, one hundred forty-three thousand, eight hundred twelve".