212440143 has 12 divisors (see below), whose sum is σ = 300896840. Its totient is φ = 133295232.

The previous prime is 212440099. The next prime is 212440157. The reversal of 212440143 is 341044212.

212440143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212440143 - 2²⁰ = 211391567 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 (212440043) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121648 + ... + 123381.

Almost surely, 2^212440143 is an apocalyptic number.

212440143 is a deficient number, since it is larger than the sum of its proper divisors (88456697).

212440143 is a wasteful number, since it uses less digits than its factorization.

212440143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245066 (or 245049 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 212440143 is about 14575.3265143529. The cubic root of 212440143 is about 596.6855606444.

Adding to 212440143 its reverse (341044212), we get a palindrome (553484355).

The spelling of 212440143 in words is "two hundred twelve million, four hundred forty thousand, one hundred forty-three".