212185990 has 8 divisors (see below), whose sum is σ = 381934800. Its totient is φ = 84874392.

The previous prime is 212185969. The next prime is 212185991. The reversal of 212185990 is 99581212.

212185990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212185991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10609290 + ... + 10609309.

It is an arithmetic number, because the mean of its divisors is an integer number (47741850).

Almost surely, 2^212185990 is an apocalyptic number.

212185990 is a deficient number, since it is larger than the sum of its proper divisors (169748810).

212185990 is a wasteful number, since it uses less digits than its factorization.

212185990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21218606.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 212185990 is about 14566.6053011675. The cubic root of 212185990 is about 596.4475172146.

The spelling of 212185990 in words is "two hundred twelve million, one hundred eighty-five thousand, nine hundred ninety".