216137762171 has 2 divisors, whose sum is σ = 216137762172. Its totient is φ = 216137762170.

The previous prime is 216137762147. The next prime is 216137762173. The reversal of 216137762171 is 171267731612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216137762171 - 2⁶ = 216137762107 is a prime.

Together with 216137762173, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (216137762173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108068881085 + 108068881086.

It is an arithmetic number, because the mean of its divisors is an integer number (108068881086).

Almost surely, 2^216137762171 is an apocalyptic number.

216137762171 is a deficient number, since it is larger than the sum of its proper divisors (1).

216137762171 is an equidigital number, since it uses as much as digits as its factorization.

216137762171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 148176, while the sum is 44.

The spelling of 216137762171 in words is "two hundred sixteen billion, one hundred thirty-seven million, seven hundred sixty-two thousand, one hundred seventy-one".