228881111 has 2 divisors, whose sum is σ = 228881112. Its totient is φ = 228881110.

The previous prime is 228881099. The next prime is 228881129. The reversal of 228881111 is 111188822.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228881111 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a zygodrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228881171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114440555 + 114440556.

It is an arithmetic number, because the mean of its divisors is an integer number (114440556).

Almost surely, 2^228881111 is an apocalyptic number.

228881111 is a deficient number, since it is larger than the sum of its proper divisors (1).

228881111 is an equidigital number, since it uses as much as digits as its factorization.

228881111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2048, while the sum is 32.

The square root of 228881111 is about 15128.8172373124. The cubic root of 228881111 is about 611.6974231215.

It can be divided in two parts, 2288811 and 11, that added together give a palindrome (2288822).

The spelling of 228881111 in words is "two hundred twenty-eight million, eight hundred eighty-one thousand, one hundred eleven".