212717161 has 8 divisors (see below), whose sum is σ = 216487520. Its totient is φ = 208964448.

The previous prime is 212717149. The next prime is 212717201. The reversal of 212717161 is 161717212.

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 212717161 - 2⁹ = 212716649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212717111) 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, 21205 + ... + 29581.

It is an arithmetic number, because the mean of its divisors is an integer number (27060940).

Almost surely, 2^212717161 is an apocalyptic number.

It is an amenable number.

212717161 is a deficient number, since it is larger than the sum of its proper divisors (3770359).

212717161 is an equidigital number, since it uses as much as digits as its factorization.

212717161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8823.

The product of its digits is 1176, while the sum is 28.

The square root of 212717161 is about 14584.8263959500. The cubic root of 212717161 is about 596.9448036232.

It can be divided in two parts, 212717 and 161, that added together give a triangular number (212878 = T₆₅₂).

The spelling of 212717161 in words is "two hundred twelve million, seven hundred seventeen thousand, one hundred sixty-one".