212163342165 has 12 divisors (see below), whose sum is σ = 367749793164. Its totient is φ = 113153782464.

The previous prime is 212163342143. The next prime is 212163342187. The reversal of 212163342165 is 561243361212.

212163342165 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 633 + 4 + 2 + 16 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (212163342143) and next prime (212163342187).

It can be written as a sum of positive squares in 2 ways, for example, as 143733490884 + 68429851281 = 379122^2 + 261591^2 .

It is not a de Polignac number, because 212163342165 - 2⁷ = 212163342037 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2357370424 + ... + 2357370513.

It is an arithmetic number, because the mean of its divisors is an integer number (30645816097).

Almost surely, 2^212163342165 is an apocalyptic number.

It is an amenable number.

212163342165 is a deficient number, since it is larger than the sum of its proper divisors (155586450999).

212163342165 is a wasteful number, since it uses less digits than its factorization.

212163342165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4714740948 (or 4714740945 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The spelling of 212163342165 in words is "two hundred twelve billion, one hundred sixty-three million, three hundred forty-two thousand, one hundred sixty-five".