86221017851 has 2 divisors, whose sum is σ = 86221017852. Its totient is φ = 86221017850.

The previous prime is 86221017761. The next prime is 86221017853. The reversal of 86221017851 is 15871012268.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86221017851 - 2²⁶ = 86153908987 is a prime.

Together with 86221017853, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 86221017799 and 86221017808.

It is not a weakly prime, because it can be changed into another prime (86221017853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43110508925 + 43110508926.

It is an arithmetic number, because the mean of its divisors is an integer number (43110508926).

Almost surely, 2^86221017851 is an apocalyptic number.

86221017851 is a deficient number, since it is larger than the sum of its proper divisors (1).

86221017851 is an equidigital number, since it uses as much as digits as its factorization.

86221017851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53760, while the sum is 41.

The spelling of 86221017851 in words is "eighty-six billion, two hundred twenty-one million, seventeen thousand, eight hundred fifty-one".