212319450 has 108 divisors (see below), whose sum is σ = 663632190. Its totient is φ = 48525120.

The previous prime is 212319427. The next prime is 212319461. The reversal of 212319450 is 54913212.

It can be written as a sum of positive squares in 3 ways, for example, as 204518601 + 7800849 = 14301^2 + 2793^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 17236 + ... + 26864.

Almost surely, 2^212319450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212319450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (331816095).

212319450 is an abundant number, since it is smaller than the sum of its proper divisors (451312740).

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

212319450 is a wasteful number, since it uses less digits than its factorization.

212319450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9661 (or 9646 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 212319450 is about 14571.1856072181. The cubic root of 212319450 is about 596.5725414951.

The spelling of 212319450 in words is "two hundred twelve million, three hundred nineteen thousand, four hundred fifty".