228262813 has 2 divisors, whose sum is σ = 228262814. Its totient is φ = 228262812.

The previous prime is 228262777. The next prime is 228262819. The reversal of 228262813 is 318262822.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 217326564 + 10936249 = 14742^2 + 3307^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228262813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228262819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114131406 + 114131407.

It is an arithmetic number, because the mean of its divisors is an integer number (114131407).

Almost surely, 2^228262813 is an apocalyptic number.

It is an amenable number.

228262813 is a deficient number, since it is larger than the sum of its proper divisors (1).

228262813 is an equidigital number, since it uses as much as digits as its factorization.

228262813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 34.

The square root of 228262813 is about 15108.3689721955. The cubic root of 228262813 is about 611.1461145264.

Subtracting 228262813 from its reverse (318262822), we obtain a palindrome (90000009).

The spelling of 228262813 in words is "two hundred twenty-eight million, two hundred sixty-two thousand, eight hundred thirteen".