213758213 has 8 divisors (see below), whose sum is σ = 223136760. Its totient is φ = 204569280.

The previous prime is 213758201. The next prime is 213758249. The reversal of 213758213 is 312857312.

213758213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 27899524 + 185858689 = 5282^2 + 13633^2 .

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 213758213 - 2¹⁰ = 213757189 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 213758213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213758513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45098 + ... + 49611.

It is an arithmetic number, because the mean of its divisors is an integer number (27892095).

Almost surely, 2^213758213 is an apocalyptic number.

It is an amenable number.

213758213 is a deficient number, since it is larger than the sum of its proper divisors (9378547).

213758213 is an equidigital number, since it uses as much as digits as its factorization.

213758213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94807.

The product of its digits is 10080, while the sum is 32.

The square root of 213758213 is about 14620.4723931889. The cubic root of 213758213 is about 597.9170485194.

Subtracting 213758213 from its reverse (312857312), we obtain a palindrome (99099099).

The spelling of 213758213 in words is "two hundred thirteen million, seven hundred fifty-eight thousand, two hundred thirteen".