228272111 has 4 divisors (see below), whose sum is σ = 228530352. Its totient is φ = 228013872.

The previous prime is 228272089. The next prime is 228272119. The reversal of 228272111 is 111272822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111272822 = 2 ⋅55636411.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228272111 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 (228272119) 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, 127790 + ... + 129563.

It is an arithmetic number, because the mean of its divisors is an integer number (57132588).

Almost surely, 2^228272111 is an apocalyptic number.

228272111 is a deficient number, since it is larger than the sum of its proper divisors (258241).

228272111 is an equidigital number, since it uses as much as digits as its factorization.

228272111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258240.

The product of its digits is 896, while the sum is 26.

The square root of 228272111 is about 15108.6766793125. The cubic root of 228272111 is about 611.1544125044.

The spelling of 228272111 in words is "two hundred twenty-eight million, two hundred seventy-two thousand, one hundred eleven".