312130212 has 48 divisors (see below), whose sum is σ = 749140224. Its totient is φ = 101088000.

The previous prime is 312130211. The next prime is 312130223. The reversal of 312130212 is 212031213.

It is a junction number, because it is equal to n+sod(n) for n = 312130191 and 312130200.

It is not an unprimeable number, because it can be changed into a prime (312130211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132162 + ... + 134502.

It is an arithmetic number, because the mean of its divisors is an integer number (15607088).

Almost surely, 2^312130212 is an apocalyptic number.

It is an amenable number.

312130212 is an abundant number, since it is smaller than the sum of its proper divisors (437010012).

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

312130212 is a wasteful number, since it uses less digits than its factorization.

312130212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2660 (or 2658 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 312130212 is about 17667.2072495910. The cubic root of 312130212 is about 678.3366294166.

Adding to 312130212 its reverse (212031213), we get a palindrome (524161425).

It can be divided in two parts, 3121 and 30212, that added together give a palindrome (33333).

The spelling of 312130212 in words is "three hundred twelve million, one hundred thirty thousand, two hundred twelve".