30531212 has 24 divisors (see below), whose sum is σ = 55998432. Its totient is φ = 14537600.

The previous prime is 30531203. The next prime is 30531223. The reversal of 30531212 is 21213503.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25262 + ... + 26442.

It is an arithmetic number, because the mean of its divisors is an integer number (2333268).

Almost surely, 2^30531212 is an apocalyptic number.

It is an amenable number.

30531212 is a deficient number, since it is larger than the sum of its proper divisors (25467220).

30531212 is a wasteful number, since it uses less digits than its factorization.

30531212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489 (or 1487 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 30531212 is about 5525.5055877268. The cubic root of 30531212 is about 312.5465300315.

Adding to 30531212 its reverse (21213503), we get a palindrome (51744715).

The spelling of 30531212 in words is "thirty million, five hundred thirty-one thousand, two hundred twelve".