228318161 has 2 divisors, whose sum is σ = 228318162. Its totient is φ = 228318160.

The previous prime is 228318133. The next prime is 228318221. The reversal of 228318161 is 161813822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197571136 + 30747025 = 14056^2 + 5545^2 .

It is a cyclic number.

It is not a de Polignac number, because 228318161 - 2¹⁰ = 228317137 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (228318361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114159080 + 114159081.

It is an arithmetic number, because the mean of its divisors is an integer number (114159081).

Almost surely, 2^228318161 is an apocalyptic number.

It is an amenable number.

228318161 is a deficient number, since it is larger than the sum of its proper divisors (1).

228318161 is an equidigital number, since it uses as much as digits as its factorization.

228318161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 32.

The square root of 228318161 is about 15110.2005612103. The cubic root of 228318161 is about 611.1955063964.

The spelling of 228318161 in words is "two hundred twenty-eight million, three hundred eighteen thousand, one hundred sixty-one".