212439171 has 32 divisors (see below), whose sum is σ = 345600000. Its totient is φ = 113369760.

The previous prime is 212439167. The next prime is 212439179. The reversal of 212439171 is 171934212.

It is not a de Polignac number, because 212439171 - 2² = 212439167 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212439179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24580 + ... + 32078.

It is an arithmetic number, because the mean of its divisors is an integer number (10800000).

Almost surely, 2^212439171 is an apocalyptic number.

212439171 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

212439171 is a deficient number, since it is larger than the sum of its proper divisors (133160829).

212439171 is a wasteful number, since it uses less digits than its factorization.

212439171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7599.

The product of its digits is 3024, while the sum is 30.

The square root of 212439171 is about 14575.2931702934. The cubic root of 212439171 is about 596.6846506167.

The spelling of 212439171 in words is "two hundred twelve million, four hundred thirty-nine thousand, one hundred seventy-one".