8227807184981 has 2 divisors, whose sum is σ = 8227807184982. Its totient is φ = 8227807184980.

The previous prime is 8227807184903. The next prime is 8227807185041. The reversal of 8227807184981 is 1894817087228.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7208446371025 + 1019360813956 = 2684855^2 + 1009634^2 .

It is a cyclic number.

It is not a de Polignac number, because 8227807184981 - 2²² = 8227802990677 is a prime.

It is a super-2 number, since 2×8227807184981² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8227807184281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4113903592490 + 4113903592491.

It is an arithmetic number, because the mean of its divisors is an integer number (4113903592491).

Almost surely, 2^{8227807184981} is an apocalyptic number.

It is an amenable number.

8227807184981 is a deficient number, since it is larger than the sum of its proper divisors (1).

8227807184981 is an equidigital number, since it uses as much as digits as its factorization.

8227807184981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28901376, while the sum is 65.

The spelling of 8227807184981 in words is "eight trillion, two hundred twenty-seven billion, eight hundred seven million, one hundred eighty-four thousand, nine hundred eighty-one".