212173912 has 48 divisors (see below), whose sum is σ = 427044600. Its totient is φ = 98553600.

The previous prime is 212173903. The next prime is 212173937. The reversal of 212173912 is 219371212.

212173912 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 528912 + ... + 529312.

Almost surely, 2^212173912 is an apocalyptic number.

It is an amenable number.

212173912 is an abundant number, since it is smaller than the sum of its proper divisors (214870688).

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

212173912 is a wasteful number, since it uses less digits than its factorization.

212173912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544 (or 481 counting only the distinct ones).

The product of its digits is 1512, while the sum is 28.

The square root of 212173912 is about 14566.1907168621. The cubic root of 212173912 is about 596.4362000523.

The spelling of 212173912 in words is "two hundred twelve million, one hundred seventy-three thousand, nine hundred twelve".