228123013 has 2 divisors, whose sum is σ = 228123014. Its totient is φ = 228123012.

The previous prime is 228123001. The next prime is 228123043. The reversal of 228123013 is 310321822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 181090849 + 47032164 = 13457^2 + 6858^2 .

It is a cyclic number.

It is not a de Polignac number, because 228123013 - 2¹⁷ = 227991941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228123043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114061506 + 114061507.

It is an arithmetic number, because the mean of its divisors is an integer number (114061507).

Almost surely, 2^228123013 is an apocalyptic number.

It is an amenable number.

228123013 is a deficient number, since it is larger than the sum of its proper divisors (1).

228123013 is an equidigital number, since it uses as much as digits as its factorization.

228123013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 228123013 is about 15103.7416887340. The cubic root of 228123013 is about 611.0213231746.

Adding to 228123013 its reverse (310321822), we get a palindrome (538444835).

The spelling of 228123013 in words is "two hundred twenty-eight million, one hundred twenty-three thousand, thirteen".