212009908 has 36 divisors (see below), whose sum is σ = 411945156. Its totient is φ = 95392000.

The previous prime is 212009881. The next prime is 212009939. The reversal of 212009908 is 809900212.

It can be written as a sum of positive squares in 2 ways, for example, as 96275344 + 115734564 = 9812^2 + 10758^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 212009908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46716 + ... + 51052.

It is an arithmetic number, because the mean of its divisors is an integer number (11442921).

Almost surely, 2^212009908 is an apocalyptic number.

It is an amenable number.

212009908 is a deficient number, since it is larger than the sum of its proper divisors (199935248).

212009908 is a wasteful number, since it uses less digits than its factorization.

212009908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4464 (or 4451 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 212009908 is about 14560.5600167027. The cubic root of 212009908 is about 596.2824847410.

The spelling of 212009908 in words is "two hundred twelve million, nine thousand, nine hundred eight".