212265290 has 16 divisors (see below), whose sum is σ = 383178600. Its totient is φ = 84661440.

The previous prime is 212265289. The next prime is 212265293. The reversal of 212265290 is 92562212.

212265290 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 can be written as a sum of positive squares in 4 ways, for example, as 191462569 + 20802721 = 13837^2 + 4561^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (212265293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26921 + ... + 33900.

Almost surely, 2^212265290 is an apocalyptic number.

212265290 is a deficient number, since it is larger than the sum of its proper divisors (170913310).

212265290 is a wasteful number, since it uses less digits than its factorization.

212265290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61177.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 212265290 is about 14569.3270263249. The cubic root of 212265290 is about 596.5218111506.

The spelling of 212265290 in words is "two hundred twelve million, two hundred sixty-five thousand, two hundred ninety".