212718870 has 192 divisors, whose sum is σ = 717050880. Its totient is φ = 42488064.

The previous prime is 212718833. The next prime is 212718907. The reversal of 212718870 is 78817212.

It is a happy number.

212718870 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (212718833) and next prime (212718907).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 154927 + ... + 156293.

It is an arithmetic number, because the mean of its divisors is an integer number (3734640).

Almost surely, 2^212718870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212718870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (358525440).

212718870 is an abundant number, since it is smaller than the sum of its proper divisors (504332010).

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

212718870 is a wasteful number, since it uses less digits than its factorization.

212718870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1419 (or 1416 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 36.

The square root of 212718870 is about 14584.8849841197. The cubic root of 212718870 is about 596.9464022655.

The spelling of 212718870 in words is "two hundred twelve million, seven hundred eighteen thousand, eight hundred seventy".