228138103 has 4 divisors (see below), whose sum is σ = 228210160. Its totient is φ = 228066048.

The previous prime is 228138089. The next prime is 228138151. The reversal of 228138103 is 301831822.

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 228138103 - 2¹³ = 228129911 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 (228138193) 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, 31050 + ... + 37687.

It is an arithmetic number, because the mean of its divisors is an integer number (57052540).

Almost surely, 2^228138103 is an apocalyptic number.

228138103 is a deficient number, since it is larger than the sum of its proper divisors (72057).

228138103 is an equidigital number, since it uses as much as digits as its factorization.

228138103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72056.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 228138103 is about 15104.2412255631. The cubic root of 228138103 is about 611.0347955965.

Adding to 228138103 its reverse (301831822), we get a palindrome (529969925).

The spelling of 228138103 in words is "two hundred twenty-eight million, one hundred thirty-eight thousand, one hundred three".