312400212 has 24 divisors (see below), whose sum is σ = 729269856. Its totient is φ = 104085408.

The previous prime is 312400201. The next prime is 312400219. The reversal of 312400212 is 212004213.

It is a junction number, because it is equal to n+sod(n) for n = 312400191 and 312400200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312400219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29538 + ... + 38694.

It is an arithmetic number, because the mean of its divisors is an integer number (30386244).

Almost surely, 2^312400212 is an apocalyptic number.

It is an amenable number.

312400212 is an abundant number, since it is smaller than the sum of its proper divisors (416869644).

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

312400212 is a wasteful number, since it uses less digits than its factorization.

312400212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12007 (or 12005 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 312400212 is about 17674.8468734527. The cubic root of 312400212 is about 678.5321654444.

Adding to 312400212 its reverse (212004213), we get a palindrome (524404425).

The spelling of 312400212 in words is "three hundred twelve million, four hundred thousand, two hundred twelve".