211340143 has 4 divisors (see below), whose sum is σ = 241531600. Its totient is φ = 181148688.

The previous prime is 211340111. The next prime is 211340149. The reversal of 211340143 is 341043112.

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

It is not a de Polignac number, because 211340143 - 2⁵ = 211340111 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 211340143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211340149) 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, 15095718 + ... + 15095731.

It is an arithmetic number, because the mean of its divisors is an integer number (60382900).

Almost surely, 2^211340143 is an apocalyptic number.

211340143 is a deficient number, since it is larger than the sum of its proper divisors (30191457).

211340143 is an equidigital number, since it uses as much as digits as its factorization.

211340143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30191456.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 211340143 is about 14537.5425364812. The cubic root of 211340143 is about 595.6539128130.

Adding to 211340143 its reverse (341043112), we get a palindrome (552383255).

The spelling of 211340143 in words is "two hundred eleven million, three hundred forty thousand, one hundred forty-three".