212142143 has 4 divisors (see below), whose sum is σ = 213147768. Its totient is φ = 211136520.

The previous prime is 212142137. The next prime is 212142211. The reversal of 212142143 is 341241212.

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 212142143 - 2¹⁸ = 211879999 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 (212142113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 502496 + ... + 502917.

It is an arithmetic number, because the mean of its divisors is an integer number (53286942).

Almost surely, 2^212142143 is an apocalyptic number.

212142143 is a deficient number, since it is larger than the sum of its proper divisors (1005625).

212142143 is a wasteful number, since it uses less digits than its factorization.

212142143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005624.

The product of its digits is 384, while the sum is 20.

The square root of 212142143 is about 14565.1001712999. The cubic root of 212142143 is about 596.4064302482.

Adding to 212142143 its reverse (341241212), we get a palindrome (553383355).

The spelling of 212142143 in words is "two hundred twelve million, one hundred forty-two thousand, one hundred forty-three".