212540143 has 2 divisors, whose sum is σ = 212540144. Its totient is φ = 212540142.

The previous prime is 212540131. The next prime is 212540177. The reversal of 212540143 is 341045212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212540143 - 2²⁵ = 178985711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212540113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106270071 + 106270072.

It is an arithmetic number, because the mean of its divisors is an integer number (106270072).

Almost surely, 2^212540143 is an apocalyptic number.

212540143 is a deficient number, since it is larger than the sum of its proper divisors (1).

212540143 is an equidigital number, since it uses as much as digits as its factorization.

212540143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 212540143 is about 14578.7565656334. The cubic root of 212540143 is about 596.7791700650.

Adding to 212540143 its reverse (341045212), we get a palindrome (553585355).

The spelling of 212540143 in words is "two hundred twelve million, five hundred forty thousand, one hundred forty-three".