212187158268 has 96 divisors (see below), whose sum is σ = 533527357440. Its totient is φ = 65418010560.

The previous prime is 212187158251. The next prime is 212187158297. The reversal of 212187158268 is 862851781212.

It is a self number, because there is not a number n which added to its sum of digits gives 212187158268.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31241953 + ... + 31248743.

It is an arithmetic number, because the mean of its divisors is an integer number (5557576640).

Almost surely, 2^212187158268 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 212187158268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266763678720).

212187158268 is an abundant number, since it is smaller than the sum of its proper divisors (321340199172).

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

212187158268 is a wasteful number, since it uses less digits than its factorization.

212187158268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10047 (or 10045 counting only the distinct ones).

The product of its digits is 860160, while the sum is 51.

The spelling of 212187158268 in words is "two hundred twelve billion, one hundred eighty-seven million, one hundred fifty-eight thousand, two hundred sixty-eight".