212999994 has 48 divisors (see below), whose sum is σ = 487075680. Its totient is φ = 67085280.

The previous prime is 212999959. The next prime is 213000001. The reversal of 212999994 is 499999212.

It is a self number, because there is not a number n which added to its sum of digits gives 212999994.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 200224 + ... + 201284.

It is an arithmetic number, because the mean of its divisors is an integer number (10147410).

Almost surely, 2^212999994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212999994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243537840).

212999994 is an abundant number, since it is smaller than the sum of its proper divisors (274075686).

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

212999994 is a wasteful number, since it uses less digits than its factorization.

212999994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1675 (or 1672 counting only the distinct ones).

The product of its digits is 944784, while the sum is 54.

The square root of 212999994 is about 14594.5193137698. The cubic root of 212999994 is about 597.2092563750.

The spelling of 212999994 in words is "two hundred twelve million, nine hundred ninety-nine thousand, nine hundred ninety-four".