212305290 has 32 divisors (see below), whose sum is σ = 509918976. Its totient is φ = 56571840.

The previous prime is 212305283. The next prime is 212305307. The reversal of 212305290 is 92503212.

212305290 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 212305290.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68719 + ... + 71741.

It is an arithmetic number, because the mean of its divisors is an integer number (15934968).

Almost surely, 2^212305290 is an apocalyptic number.

212305290 is an abundant number, since it is smaller than the sum of its proper divisors (297613686).

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

212305290 is a wasteful number, since it uses less digits than its factorization.

212305290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5374.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 212305290 is about 14570.6997086619. The cubic root of 212305290 is about 596.5592790032.

The spelling of 212305290 in words is "two hundred twelve million, three hundred five thousand, two hundred ninety".