212825930 has 16 divisors (see below), whose sum is σ = 383420520. Its totient is φ = 85056192.

The previous prime is 212825911. The next prime is 212825989. The reversal of 212825930 is 39528212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 211906249 + 919681 = 14557^2 + 959^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3632 + ... + 20948.

Almost surely, 2^212825930 is an apocalyptic number.

212825930 is a deficient number, since it is larger than the sum of its proper divisors (170594590).

212825930 is a wasteful number, since it uses less digits than its factorization.

212825930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18553.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 212825930 is about 14588.5547604963. The cubic root of 212825930 is about 597.0465318609.

The spelling of 212825930 in words is "two hundred twelve million, eight hundred twenty-five thousand, nine hundred thirty".