2145540143 has 2 divisors, whose sum is σ = 2145540144. Its totient is φ = 2145540142.

The previous prime is 2145540121. The next prime is 2145540151. The reversal of 2145540143 is 3410455412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2145540143 - 2⁶ = 2145540079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2145540043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072770071 + 1072770072.

It is an arithmetic number, because the mean of its divisors is an integer number (1072770072).

Almost surely, 2^2145540143 is an apocalyptic number.

2145540143 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145540143 is an equidigital number, since it uses as much as digits as its factorization.

2145540143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 2145540143 is about 46319.9756368675. The cubic root of 2145540143 is about 1289.7698331414.

Adding to 2145540143 its reverse (3410455412), we get a palindrome (5555995555).

The spelling of 2145540143 in words is "two billion, one hundred forty-five million, five hundred forty thousand, one hundred forty-three".