212172163 has 8 divisors (see below), whose sum is σ = 242661632. Its totient is φ = 181727496.

The previous prime is 212172161. The next prime is 212172179. The reversal of 212172163 is 361271212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212172163 - 2¹ = 212172161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212172161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345 + ... + 20602.

It is an arithmetic number, because the mean of its divisors is an integer number (30332704).

Almost surely, 2^212172163 is an apocalyptic number.

212172163 is a deficient number, since it is larger than the sum of its proper divisors (30489469).

212172163 is a wasteful number, since it uses less digits than its factorization.

212172163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22401.

The product of its digits is 1008, while the sum is 25.

The square root of 212172163 is about 14566.1306804518. The cubic root of 212172163 is about 596.4345611927.

The spelling of 212172163 in words is "two hundred twelve million, one hundred seventy-two thousand, one hundred sixty-three".