212166216260 has 48 divisors (see below), whose sum is σ = 452475485616. Its totient is φ = 83556237312.

The previous prime is 212166216239. The next prime is 212166216329. The reversal of 212166216260 is 62612661212.

It can be written as a sum of positive squares in 8 ways, for example, as 3351946816 + 208814269444 = 57896^2 + 456962^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 212166216260.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91094 + ... + 657746.

It is an arithmetic number, because the mean of its divisors is an integer number (9426572617).

Almost surely, 2^212166216260 is an apocalyptic number.

212166216260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212166216260 is an abundant number, since it is smaller than the sum of its proper divisors (240309269356).

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

212166216260 is a wasteful number, since it uses less digits than its factorization.

212166216260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566952 (or 566950 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

Adding to 212166216260 its reverse (62612661212), we get a palindrome (274778877472).

The spelling of 212166216260 in words is "two hundred twelve billion, one hundred sixty-six million, two hundred sixteen thousand, two hundred sixty".