213143 has 4 divisors (see below), whose sum is σ = 243600. Its totient is φ = 182688.

The previous prime is 213139. The next prime is 213149. The reversal of 213143 is 341312.

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 213143 - 2² = 213139 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213149) 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, 15218 + ... + 15231.

It is an arithmetic number, because the mean of its divisors is an integer number (60900).

2²¹³¹⁴³ is an apocalyptic number.

213143 is a deficient number, since it is larger than the sum of its proper divisors (30457).

213143 is an equidigital number, since it uses as much as digits as its factorization.

213143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30456.

The product of its digits is 72, while the sum is 14.

The square root of 213143 is about 461.6741274969. The cubic root of 213143 is about 59.7342879854.

Adding to 213143 its reverse (341312), we get a palindrome (554455).

The spelling of 213143 in words is "two hundred thirteen thousand, one hundred forty-three".