228145147 has 4 divisors (see below), whose sum is σ = 228181840. Its totient is φ = 228108456.

The previous prime is 228145123. The next prime is 228145187. The reversal of 228145147 is 741541822.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 228145147 - 2¹¹ = 228143099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228145187) 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 3 ways as a sum of consecutive naturals, for example, 6447 + ... + 22312.

It is an arithmetic number, because the mean of its divisors is an integer number (57045460).

Almost surely, 2^228145147 is an apocalyptic number.

228145147 is a deficient number, since it is larger than the sum of its proper divisors (36693).

228145147 is an equidigital number, since it uses as much as digits as its factorization.

228145147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36692.

The product of its digits is 17920, while the sum is 34.

The square root of 228145147 is about 15104.4744033018. The cubic root of 228145147 is about 611.0410843090.

Adding to 228145147 its reverse (741541822), we get a palindrome (969686969).

The spelling of 228145147 in words is "two hundred twenty-eight million, one hundred forty-five thousand, one hundred forty-seven".