86310223981 has 2 divisors, whose sum is σ = 86310223982. Its totient is φ = 86310223980.

The previous prime is 86310223939. The next prime is 86310223991. The reversal of 86310223981 is 18932201368.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56703515625 + 29606708356 = 238125^2 + 172066^2 .

It is a cyclic number.

It is not a de Polignac number, because 86310223981 - 2⁹ = 86310223469 is a prime.

It is a super-2 number, since 2×86310223981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86310223991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43155111990 + 43155111991.

It is an arithmetic number, because the mean of its divisors is an integer number (43155111991).

Almost surely, 2^86310223981 is an apocalyptic number.

It is an amenable number.

86310223981 is a deficient number, since it is larger than the sum of its proper divisors (1).

86310223981 is an equidigital number, since it uses as much as digits as its factorization.

86310223981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 86310223981 in words is "eighty-six billion, three hundred ten million, two hundred twenty-three thousand, nine hundred eighty-one".