212039171 has 4 divisors (see below), whose sum is σ = 212069112. Its totient is φ = 212009232.

The previous prime is 212039159. The next prime is 212039197. The reversal of 212039171 is 171930212.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 212039171 - 2¹⁴ = 212022787 is a prime.

It is a super-2 number, since 2×212039171² = 89921220076734482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212039171.

It is not an unprimeable number, because it can be changed into a prime (212039131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2276 + ... + 20718.

It is an arithmetic number, because the mean of its divisors is an integer number (53017278).

Almost surely, 2^212039171 is an apocalyptic number.

212039171 is a deficient number, since it is larger than the sum of its proper divisors (29941).

212039171 is a wasteful number, since it uses less digits than its factorization.

212039171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29940.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 212039171 is about 14561.5648540945. The cubic root of 212039171 is about 596.3099177539.

Adding to 212039171 its reverse (171930212), we get a palindrome (383969383).

The spelling of 212039171 in words is "two hundred twelve million, thirty-nine thousand, one hundred seventy-one".