71206212 has 144 divisors (see below), whose sum is σ = 214885440. Its totient is φ = 18144000.

The previous prime is 71206207. The next prime is 71206231. The reversal of 71206212 is 21260217.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 653214 + ... + 653322.

It is an arithmetic number, because the mean of its divisors is an integer number (1492260).

Almost surely, 2^71206212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71206212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107442720).

71206212 is an abundant number, since it is smaller than the sum of its proper divisors (143679228).

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

71206212 is a wasteful number, since it uses less digits than its factorization.

71206212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 71206212 is about 8438.3773321652. The cubic root of 71206212 is about 414.4822730488.

Adding to 71206212 its reverse (21260217), we get a palindrome (92466429).

The spelling of 71206212 in words is "seventy-one million, two hundred six thousand, two hundred twelve".