228323917 has 2 divisors, whose sum is σ = 228323918. Its totient is φ = 228323916.

The previous prime is 228323899. The next prime is 228323993. The reversal of 228323917 is 719323822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123076836 + 105247081 = 11094^2 + 10259^2 .

It is a cyclic number.

It is not a de Polignac number, because 228323917 - 2¹¹ = 228321869 is a prime.

It is a super-2 number, since 2×228323917² = 104263622148445778, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228327917) 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, 114161958 + 114161959.

It is an arithmetic number, because the mean of its divisors is an integer number (114161959).

Almost surely, 2^228323917 is an apocalyptic number.

It is an amenable number.

228323917 is a deficient number, since it is larger than the sum of its proper divisors (1).

228323917 is an equidigital number, since it uses as much as digits as its factorization.

228323917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 37.

The square root of 228323917 is about 15110.3910273692. The cubic root of 228323917 is about 611.2006425213.

The spelling of 228323917 in words is "two hundred twenty-eight million, three hundred twenty-three thousand, nine hundred seventeen".