86171422237 has 4 divisors (see below), whose sum is σ = 89142850620. Its totient is φ = 83199993856.

The previous prime is 86171422187. The next prime is 86171422243. The reversal of 86171422237 is 73222417168.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38358789316 + 47812632921 = 195854^2 + 218661^2 .

It is a cyclic number.

It is not a de Polignac number, because 86171422237 - 2²³ = 86163033629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 86171422193 and 86171422202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86171422297) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1485714148 + ... + 1485714205.

It is an arithmetic number, because the mean of its divisors is an integer number (22285712655).

Almost surely, 2^86171422237 is an apocalyptic number.

It is an amenable number.

86171422237 is a deficient number, since it is larger than the sum of its proper divisors (2971428383).

86171422237 is a wasteful number, since it uses less digits than its factorization.

86171422237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2971428382.

The product of its digits is 225792, while the sum is 43.

The spelling of 86171422237 in words is "eighty-six billion, one hundred seventy-one million, four hundred twenty-two thousand, two hundred thirty-seven".