212171712 has 28 divisors (see below), whose sum is σ = 561371496. Its totient is φ = 70723840.

The previous prime is 212171699. The next prime is 212171717. The reversal of 212171712 is 217171212.

212171712 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212171717) 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, 552339 + ... + 552722.

It is an arithmetic number, because the mean of its divisors is an integer number (20048982).

Almost surely, 2^212171712 is an apocalyptic number.

It is an amenable number.

212171712 is an abundant number, since it is smaller than the sum of its proper divisors (349199784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212171712 is a wasteful number, since it uses less digits than its factorization.

212171712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105076 (or 1105066 counting only the distinct ones).

The product of its digits is 392, while the sum is 24.

The square root of 212171712 is about 14566.1151993248. The cubic root of 212171712 is about 596.4341385922.

212171712 divided by its sum of digits (24) gives a palindrome (8840488).

The spelling of 212171712 in words is "two hundred twelve million, one hundred seventy-one thousand, seven hundred twelve".