212818980 has 96 divisors (see below), whose sum is σ = 655441920. Its totient is φ = 51166080.

The previous prime is 212818979. The next prime is 212819011. The reversal of 212818980 is 89818212.

212818980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 82551 + ... + 85089.

It is an arithmetic number, because the mean of its divisors is an integer number (6827520).

Almost surely, 2^212818980 is an apocalyptic number.

212818980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212818980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (327720960).

212818980 is an abundant number, since it is smaller than the sum of its proper divisors (442622940).

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

212818980 is a wasteful number, since it uses less digits than its factorization.

212818980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2689 (or 2687 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 39.

The square root of 212818980 is about 14588.3165581228. The cubic root of 212818980 is about 597.0400327804.

The spelling of 212818980 in words is "two hundred twelve million, eight hundred eighteen thousand, nine hundred eighty".