30105212 has 12 divisors (see below), whose sum is σ = 52727976. Its totient is φ = 15040080.

The previous prime is 30105209. The next prime is 30105307. The reversal of 30105212 is 21250103.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4163 + ... + 8805.

It is an arithmetic number, because the mean of its divisors is an integer number (4393998).

Almost surely, 2^30105212 is an apocalyptic number.

It is an amenable number.

30105212 is a deficient number, since it is larger than the sum of its proper divisors (22622764).

30105212 is a wasteful number, since it uses less digits than its factorization.

30105212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6268 (or 6266 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 30105212 is about 5486.8216665024. The cubic root of 30105212 is about 311.0860691673.

Adding to 30105212 its reverse (21250103), we get a palindrome (51355315).

The spelling of 30105212 in words is "thirty million, one hundred five thousand, two hundred twelve".