228145149 has 12 divisors (see below), whose sum is σ = 329673916. Its totient is φ = 152036352.

The previous prime is 228145123. The next prime is 228145187. The reversal of 228145149 is 941541822.

It can be written as a sum of positive squares in 2 ways, for example, as 164942649 + 63202500 = 12843^2 + 7950^2 .

It is not a de Polignac number, because 228145149 - 2⁸ = 228144893 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 (228147149) 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 11 ways as a sum of consecutive naturals, for example, 42399 + ... + 47475.

Almost surely, 2^228145149 is an apocalyptic number.

It is an amenable number.

228145149 is a deficient number, since it is larger than the sum of its proper divisors (101528767).

228145149 is a wasteful number, since it uses less digits than its factorization.

228145149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10076 (or 10073 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 228145149 is about 15104.4744695074. The cubic root of 228145149 is about 611.0410860945.

The spelling of 228145149 in words is "two hundred twenty-eight million, one hundred forty-five thousand, one hundred forty-nine".