312421213 has 16 divisors (see below), whose sum is σ = 355340160. Its totient is φ = 272505024.

The previous prime is 312421177. The next prime is 312421231. The reversal of 312421213 is 312124213.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 312421213 - 2¹⁷ = 312290141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312421243) 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 15 ways as a sum of consecutive naturals, for example, 18523 + ... + 31111.

It is an arithmetic number, because the mean of its divisors is an integer number (22208760).

Almost surely, 2^312421213 is an apocalyptic number.

It is an amenable number.

312421213 is a deficient number, since it is larger than the sum of its proper divisors (42918947).

312421213 is a wasteful number, since it uses less digits than its factorization.

312421213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12708.

The product of its digits is 288, while the sum is 19.

The square root of 312421213 is about 17675.4409563100. The cubic root of 312421213 is about 678.5473698031.

Adding to 312421213 its reverse (312124213), we get a palindrome (624545426).

The spelling of 312421213 in words is "three hundred twelve million, four hundred twenty-one thousand, two hundred thirteen".