228145013 has 2 divisors, whose sum is σ = 228145014. Its totient is φ = 228145012.

The previous prime is 228144977. The next prime is 228145031. The reversal of 228145013 is 310541822.

Together with next prime (228145031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149255089 + 78889924 = 12217^2 + 8882^2 .

It is a cyclic number.

It is not a de Polignac number, because 228145013 - 2⁶ = 228144949 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_12546134 and since 228145013 and 12546134 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228145913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114072506 + 114072507.

It is an arithmetic number, because the mean of its divisors is an integer number (114072507).

Almost surely, 2^228145013 is an apocalyptic number.

It is an amenable number.

228145013 is a deficient number, since it is larger than the sum of its proper divisors (1).

228145013 is an equidigital number, since it uses as much as digits as its factorization.

228145013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 228145013 is about 15104.4699675295. The cubic root of 228145013 is about 611.0409646783.

Adding to 228145013 its reverse (310541822), we get a palindrome (538686835).

The spelling of 228145013 in words is "two hundred twenty-eight million, one hundred forty-five thousand, thirteen".