212208290 has 64 divisors (see below), whose sum is σ = 454616064. Its totient is φ = 69808128.

The previous prime is 212208289. The next prime is 212208301. The reversal of 212208290 is 92802212.

It is a Curzon 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 31 ways as a sum of consecutive naturals, for example, 173762 + ... + 174978.

It is an arithmetic number, because the mean of its divisors is an integer number (7103376).

Almost surely, 2^212208290 is an apocalyptic number.

212208290 is an abundant number, since it is smaller than the sum of its proper divisors (242407774).

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

212208290 is a wasteful number, since it uses less digits than its factorization.

212208290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 212208290 is about 14567.3707305059. The cubic root of 212208290 is about 596.4684113268.

The spelling of 212208290 in words is "two hundred twelve million, two hundred eight thousand, two hundred ninety".