312212133 has 12 divisors (see below), whose sum is σ = 451234368. Its totient is φ = 208020840.

The previous prime is 312212119. The next prime is 312212137. The reversal of 312212133 is 331212213.

It is not a de Polignac number, because 312212133 - 2⁸ = 312211877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312212137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8068 + ... + 26258.

It is an arithmetic number, because the mean of its divisors is an integer number (37602864).

Almost surely, 2^312212133 is an apocalyptic number.

It is an amenable number.

312212133 is a deficient number, since it is larger than the sum of its proper divisors (139022235).

312212133 is a wasteful number, since it uses less digits than its factorization.

312212133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20104 (or 20101 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 312212133 is about 17669.5255454129. The cubic root of 312212133 is about 678.3959691323.

Adding to 312212133 its reverse (331212213), we get a palindrome (643424346).

The spelling of 312212133 in words is "three hundred twelve million, two hundred twelve thousand, one hundred thirty-three".