228486647981 has 2 divisors, whose sum is σ = 228486647982. Its totient is φ = 228486647980.

The previous prime is 228486647971. The next prime is 228486648077. The reversal of 228486647981 is 189746684822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144468408100 + 84018239881 = 380090^2 + 289859^2 .

It is a cyclic number.

It is not a de Polignac number, because 228486647981 - 2¹⁸ = 228486385837 is a prime.

It is a super-2 number, since 2×228486647981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228486647971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114243323990 + 114243323991.

It is an arithmetic number, because the mean of its divisors is an integer number (114243323991).

Almost surely, 2^228486647981 is an apocalyptic number.

It is an amenable number.

228486647981 is a deficient number, since it is larger than the sum of its proper divisors (1).

228486647981 is an equidigital number, since it uses as much as digits as its factorization.

228486647981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 74317824, while the sum is 65.

The spelling of 228486647981 in words is "two hundred twenty-eight billion, four hundred eighty-six million, six hundred forty-seven thousand, nine hundred eighty-one".