228145143 has 16 divisors (see below), whose sum is σ = 312667520. Its totient is φ = 147891744.

The previous prime is 228145123. The next prime is 228145187. The reversal of 228145143 is 341541822.

It is not a de Polignac number, because 228145143 - 2⁵ = 228145111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 228145143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228145123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25680 + ... + 33402.

It is an arithmetic number, because the mean of its divisors is an integer number (19541720).

Almost surely, 2^228145143 is an apocalyptic number.

228145143 is a deficient number, since it is larger than the sum of its proper divisors (84522377).

228145143 is a wasteful number, since it uses less digits than its factorization.

228145143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7998.

The product of its digits is 7680, while the sum is 30.

The square root of 228145143 is about 15104.4742708907. The cubic root of 228145143 is about 611.0410807379.

Adding to 228145143 its reverse (341541822), we get a palindrome (569686965).

The spelling of 228145143 in words is "two hundred twenty-eight million, one hundred forty-five thousand, one hundred forty-three".