212249994 has 64 divisors (see below), whose sum is σ = 481185792. Its totient is φ = 61833600.

The previous prime is 212249993. The next prime is 212250023. The reversal of 212249994 is 499942212.

212249994 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (212249993) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 464214 + ... + 464670.

It is an arithmetic number, because the mean of its divisors is an integer number (7518528).

Almost surely, 2^212249994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212249994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240592896).

212249994 is an abundant number, since it is smaller than the sum of its proper divisors (268935798).

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

212249994 is a wasteful number, since it uses less digits than its factorization.

212249994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731.

The product of its digits is 93312, while the sum is 42.

The square root of 212249994 is about 14568.8020784140. The cubic root of 212249994 is about 596.5074821996.

The spelling of 212249994 in words is "two hundred twelve million, two hundred forty-nine thousand, nine hundred ninety-four".