30711212 has 12 divisors (see below), whose sum is σ = 61422480. Its totient is φ = 13161936.

The previous prime is 30711199. The next prime is 30711217. The reversal of 30711212 is 21211703.

30711212 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (30711217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 548387 + ... + 548442.

It is an arithmetic number, because the mean of its divisors is an integer number (5118540).

Almost surely, 2^30711212 is an apocalyptic number.

It is an amenable number.

30711212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

30711212 is a wasteful number, since it uses less digits than its factorization.

30711212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096840 (or 1096838 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 30711212 is about 5541.7697534271. The cubic root of 30711212 is about 313.1595439862.

Adding to 30711212 its reverse (21211703), we get a palindrome (51922915).

The spelling of 30711212 in words is "thirty million, seven hundred eleven thousand, two hundred twelve".