228131467181 has 2 divisors, whose sum is σ = 228131467182. Its totient is φ = 228131467180.

The previous prime is 228131467171. The next prime is 228131467219. The reversal of 228131467181 is 181764131822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146711980900 + 81419486281 = 383030^2 + 285341^2 .

It is a cyclic number.

It is not a de Polignac number, because 228131467181 - 2²⁶ = 228064358317 is a prime.

It is a super-2 number, since 2×228131467181² (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 (228131467171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114065733590 + 114065733591.

It is an arithmetic number, because the mean of its divisors is an integer number (114065733591).

Almost surely, 2^228131467181 is an apocalyptic number.

It is an amenable number.

228131467181 is a deficient number, since it is larger than the sum of its proper divisors (1).

228131467181 is an equidigital number, since it uses as much as digits as its factorization.

228131467181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 44.

The spelling of 228131467181 in words is "two hundred twenty-eight billion, one hundred thirty-one million, four hundred sixty-seven thousand, one hundred eighty-one".