40212143 has 2 divisors, whose sum is σ = 40212144. Its totient is φ = 40212142.

The previous prime is 40212131. The next prime is 40212149. The reversal of 40212143 is 34121204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40212143 - 2⁶ = 40212079 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40212149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20106071 + 20106072.

It is an arithmetic number, because the mean of its divisors is an integer number (20106072).

Almost surely, 2^40212143 is an apocalyptic number.

40212143 is a deficient number, since it is larger than the sum of its proper divisors (1).

40212143 is an equidigital number, since it uses as much as digits as its factorization.

40212143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 40212143 is about 6341.3045187879. The cubic root of 40212143 is about 342.5987226735.

Adding to 40212143 its reverse (34121204), we get a palindrome (74333347).

The spelling of 40212143 in words is "forty million, two hundred twelve thousand, one hundred forty-three".