212168159 has 4 divisors (see below), whose sum is σ = 242477904. Its totient is φ = 181858416.

The previous prime is 212168141. The next prime is 212168171. The reversal of 212168159 is 951861212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212168159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212168119) 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, 15154862 + ... + 15154875.

It is an arithmetic number, because the mean of its divisors is an integer number (60619476).

Almost surely, 2^212168159 is an apocalyptic number.

212168159 is a deficient number, since it is larger than the sum of its proper divisors (30309745).

212168159 is an equidigital number, since it uses as much as digits as its factorization.

212168159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30309744.

The product of its digits is 8640, while the sum is 35.

The square root of 212168159 is about 14565.9932376752. The cubic root of 212168159 is about 596.4308093040.

The spelling of 212168159 in words is "two hundred twelve million, one hundred sixty-eight thousand, one hundred fifty-nine".