228651361 has 2 divisors, whose sum is σ = 228651362. Its totient is φ = 228651360.

The previous prime is 228651323. The next prime is 228651419. The reversal of 228651361 is 163156822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119574225 + 109077136 = 10935^2 + 10444^2 .

It is a cyclic number.

It is not a de Polignac number, because 228651361 - 2¹⁹ = 228127073 is a prime.

It is not a weakly prime, because it can be changed into another prime (228651961) 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, 114325680 + 114325681.

It is an arithmetic number, because the mean of its divisors is an integer number (114325681).

Almost surely, 2^228651361 is an apocalyptic number.

It is an amenable number.

228651361 is a deficient number, since it is larger than the sum of its proper divisors (1).

228651361 is an equidigital number, since it uses as much as digits as its factorization.

228651361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 34.

The square root of 228651361 is about 15121.2222058933. Note that the first 4 decimals coincide. The cubic root of 228651361 is about 611.4926814075.

The spelling of 228651361 in words is "two hundred twenty-eight million, six hundred fifty-one thousand, three hundred sixty-one".