30221812 has 12 divisors (see below), whose sum is σ = 52931200. Its totient is φ = 15098616.

The previous prime is 30221771. The next prime is 30221827. The reversal of 30221812 is 21812203.

It is a self number, because there is not a number n which added to its sum of digits gives 30221812.

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, 4573 + ... + 9019.

Almost surely, 2^30221812 is an apocalyptic number.

It is an amenable number.

30221812 is a deficient number, since it is larger than the sum of its proper divisors (22709388).

30221812 is a wasteful number, since it uses less digits than its factorization.

30221812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6150 (or 6148 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 30221812 is about 5497.4368573000. The cubic root of 30221812 is about 311.4871725508.

The spelling of 30221812 in words is "thirty million, two hundred twenty-one thousand, eight hundred twelve".