212387213 has 8 divisors (see below), whose sum is σ = 220148280. Its totient is φ = 204655360.

The previous prime is 212387209. The next prime is 212387233. The reversal of 212387213 is 312783212.

It can be written as a sum of positive squares in 4 ways, for example, as 14884 + 212372329 = 122^2 + 14573^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212387213 - 2² = 212387209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212387233) 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 7 ways as a sum of consecutive naturals, for example, 8081 + ... + 22137.

It is an arithmetic number, because the mean of its divisors is an integer number (27518535).

Almost surely, 2^212387213 is an apocalyptic number.

It is an amenable number.

212387213 is a deficient number, since it is larger than the sum of its proper divisors (7761067).

212387213 is a wasteful number, since it uses less digits than its factorization.

212387213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14607.

The product of its digits is 4032, while the sum is 29.

The square root of 212387213 is about 14573.5106614707. The cubic root of 212387213 is about 596.6360012884.

The spelling of 212387213 in words is "two hundred twelve million, three hundred eighty-seven thousand, two hundred thirteen".