228595681 has 2 divisors, whose sum is σ = 228595682. Its totient is φ = 228595680.

The previous prime is 228595673. The next prime is 228595687. The reversal of 228595681 is 186595822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207619281 + 20976400 = 14409^2 + 4580^2 .

It is a cyclic number.

It is not a de Polignac number, because 228595681 - 2³ = 228595673 is a prime.

It is a super-2 number, since 2×228595681² = 104511970743707522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (228595687) 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, 114297840 + 114297841.

It is an arithmetic number, because the mean of its divisors is an integer number (114297841).

Almost surely, 2^228595681 is an apocalyptic number.

It is an amenable number.

228595681 is a deficient number, since it is larger than the sum of its proper divisors (1).

228595681 is an equidigital number, since it uses as much as digits as its factorization.

228595681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 345600, while the sum is 46.

The square root of 228595681 is about 15119.3809727780. The cubic root of 228595681 is about 611.4430415301.

The spelling of 228595681 in words is "two hundred twenty-eight million, five hundred ninety-five thousand, six hundred eighty-one".