228149 has 4 divisors (see below), whose sum is σ = 229164. Its totient is φ = 227136.

The previous prime is 228139. The next prime is 228181. The reversal of 228149 is 941822.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 165649 + 62500 = 407^2 + 250^2 .

It is a cyclic number.

It is not a de Polignac number, because 228149 - 2⁸ = 227893 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 228149.

It is not an unprimeable number, because it can be changed into a prime (228139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2 + ... + 675.

It is an arithmetic number, because the mean of its divisors is an integer number (57291).

2²²⁸¹⁴⁹ is an apocalyptic number.

It is an amenable number.

228149 is a deficient number, since it is larger than the sum of its proper divisors (1015).

228149 is an equidigital number, since it uses as much as digits as its factorization.

228149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014.

The product of its digits is 1152, while the sum is 26.

The square root of 228149 is about 477.6494530511. The cubic root of 228149 is about 61.1044524119.

The spelling of 228149 in words is "two hundred twenty-eight thousand, one hundred forty-nine".