228511163281 has 2 divisors, whose sum is σ = 228511163282. Its totient is φ = 228511163280.

The previous prime is 228511163267. The next prime is 228511163317. The reversal of 228511163281 is 182361115822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 227544264256 + 966899025 = 477016^2 + 31095^2 .

It is a cyclic number.

It is not a de Polignac number, because 228511163281 - 2¹¹ = 228511161233 is a prime.

It is a super-2 number, since 2×228511163281² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (228511163081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114255581640 + 114255581641.

It is an arithmetic number, because the mean of its divisors is an integer number (114255581641).

Almost surely, 2^228511163281 is an apocalyptic number.

It is an amenable number.

228511163281 is a deficient number, since it is larger than the sum of its proper divisors (1).

228511163281 is an equidigital number, since it uses as much as digits as its factorization.

228511163281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46080, while the sum is 40.

The spelling of 228511163281 in words is "two hundred twenty-eight billion, five hundred eleven million, one hundred sixty-three thousand, two hundred eighty-one".