228145111 has 2 divisors, whose sum is σ = 228145112. Its totient is φ = 228145110.

The previous prime is 228145091. The next prime is 228145121. The reversal of 228145111 is 111541822.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 228145111 - 2¹⁹ = 227620823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228145121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114072555 + 114072556.

It is an arithmetic number, because the mean of its divisors is an integer number (114072556).

Almost surely, 2^228145111 is an apocalyptic number.

228145111 is a deficient number, since it is larger than the sum of its proper divisors (1).

228145111 is an equidigital number, since it uses as much as digits as its factorization.

228145111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 640, while the sum is 25.

The square root of 228145111 is about 15104.4732116019. The cubic root of 228145111 is about 611.0410521694.

Adding to 228145111 its reverse (111541822), we get a palindrome (339686933).

The spelling of 228145111 in words is "two hundred twenty-eight million, one hundred forty-five thousand, one hundred eleven".