213071 has 4 divisors (see below), whose sum is σ = 216144. Its totient is φ = 210000.

The previous prime is 213067. The next prime is 213079. The reversal of 213071 is 170312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213071 - 2² = 213067 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 (213079) 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, 1430 + ... + 1571.

It is an arithmetic number, because the mean of its divisors is an integer number (54036).

2²¹³⁰⁷¹ is an apocalyptic number.

213071 is a deficient number, since it is larger than the sum of its proper divisors (3073).

213071 is an equidigital number, since it uses as much as digits as its factorization.

213071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3072.

The product of its (nonzero) digits is 42, while the sum is 14.

The square root of 213071 is about 461.5961438314. The cubic root of 213071 is about 59.7275611196.

Adding to 213071 its reverse (170312), we get a palindrome (383383).

The spelling of 213071 in words is "two hundred thirteen thousand, seventy-one".