30681212 has 6 divisors (see below), whose sum is σ = 53692128. Its totient is φ = 15340604.

The previous prime is 30681193. The next prime is 30681221. The reversal of 30681212 is 21218603.

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, 3835148 + ... + 3835155.

It is an arithmetic number, because the mean of its divisors is an integer number (8948688).

Almost surely, 2^30681212 is an apocalyptic number.

It is an amenable number.

30681212 is a deficient number, since it is larger than the sum of its proper divisors (23010916).

30681212 is a wasteful number, since it uses less digits than its factorization.

30681212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7670307 (or 7670305 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 30681212 is about 5539.0623755289. The cubic root of 30681212 is about 313.0575416398.

Adding to 30681212 its reverse (21218603), we get a palindrome (51899815).

It can be divided in two parts, 306 and 81212, that added together give a palindrome (81518).

The spelling of 30681212 in words is "thirty million, six hundred eighty-one thousand, two hundred twelve".