212313109 has 4 divisors (see below), whose sum is σ = 213063616. Its totient is φ = 211562604.

The previous prime is 212313107. The next prime is 212313133. The reversal of 212313109 is 901313212.

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.

It is a cyclic number.

It is not a de Polignac number, because 212313109 - 2¹ = 212313107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212313109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212313107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 374829 + ... + 375394.

It is an arithmetic number, because the mean of its divisors is an integer number (53265904).

Almost surely, 2^212313109 is an apocalyptic number.

It is an amenable number.

212313109 is a deficient number, since it is larger than the sum of its proper divisors (750507).

212313109 is an equidigital number, since it uses as much as digits as its factorization.

212313109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750506.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 212313109 is about 14570.9680186321. The cubic root of 212313109 is about 596.5666024818.

The spelling of 212313109 in words is "two hundred twelve million, three hundred thirteen thousand, one hundred nine".