212105713 has 4 divisors (see below), whose sum is σ = 217038448. Its totient is φ = 207172980.

The previous prime is 212105711. The next prime is 212105717. The reversal of 212105713 is 317501212.

It is a happy number.

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 212105713 - 2¹ = 212105711 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212105711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2466303 + ... + 2466388.

It is an arithmetic number, because the mean of its divisors is an integer number (54259612).

Almost surely, 2^212105713 is an apocalyptic number.

It is an amenable number.

212105713 is a deficient number, since it is larger than the sum of its proper divisors (4932735).

212105713 is an equidigital number, since it uses as much as digits as its factorization.

212105713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4932734.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 212105713 is about 14563.8495254517. The cubic root of 212105713 is about 596.3722890984.

Adding to 212105713 its reverse (317501212), we get a palindrome (529606925).

The spelling of 212105713 in words is "two hundred twelve million, one hundred five thousand, seven hundred thirteen".