30055212 has 84 divisors (see below), whose sum is σ = 86119656. Its totient is φ = 9097920.

The previous prime is 30055147. The next prime is 30055217. The reversal of 30055212 is 21255003.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (30055217) by changing a digit.

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 27 ways as a sum of consecutive naturals, for example, 31608 + ... + 32544.

It is an arithmetic number, because the mean of its divisors is an integer number (1025234).

Almost surely, 2^30055212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30055212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43059828).

30055212 is an abundant number, since it is smaller than the sum of its proper divisors (56064444).

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

30055212 is a wasteful number, since it uses less digits than its factorization.

30055212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970 (or 953 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 30055212 is about 5482.2634011875. The cubic root of 30055212 is about 310.9137521336.

The spelling of 30055212 in words is "thirty million, fifty-five thousand, two hundred twelve".