30321212 has 6 divisors (see below), whose sum is σ = 53062128. Its totient is φ = 15160604.

The previous prime is 30321197. The next prime is 30321229. The reversal of 30321212 is 21212303.

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 as a sum of consecutive naturals, namely, 3790148 + ... + 3790155.

It is an arithmetic number, because the mean of its divisors is an integer number (8843688).

Almost surely, 2^30321212 is an apocalyptic number.

It is an amenable number.

30321212 is a deficient number, since it is larger than the sum of its proper divisors (22740916).

30321212 is a wasteful number, since it uses less digits than its factorization.

30321212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7580307 (or 7580305 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 30321212 is about 5506.4700126306. The cubic root of 30321212 is about 311.8282941906.

Adding to 30321212 its reverse (21212303), we get a palindrome (51533515).

The spelling of 30321212 in words is "thirty million, three hundred twenty-one thousand, two hundred twelve".