312212013 has 4 divisors (see below), whose sum is σ = 416282688. Its totient is φ = 208141340.

The previous prime is 312212003. The next prime is 312212077. The reversal of 312212013 is 310212213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 310212213 = 3 ⋅103404071.

It is a cyclic number.

It is not a de Polignac number, because 312212013 - 2⁴ = 312211997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 312211983 and 312212001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312212003) 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 3 ways as a sum of consecutive naturals, for example, 52035333 + ... + 52035338.

It is an arithmetic number, because the mean of its divisors is an integer number (104070672).

Almost surely, 2^312212013 is an apocalyptic number.

It is an amenable number.

312212013 is a deficient number, since it is larger than the sum of its proper divisors (104070675).

312212013 is a wasteful number, since it uses less digits than its factorization.

312212013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104070674.

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

The square root of 312212013 is about 17669.5221497357. The cubic root of 312212013 is about 678.3958822176.

Adding to 312212013 its reverse (310212213), we get a palindrome (622424226).

The spelling of 312212013 in words is "three hundred twelve million, two hundred twelve thousand, thirteen".