2145220543 has 2 divisors, whose sum is σ = 2145220544. Its totient is φ = 2145220542.

The previous prime is 2145220513. The next prime is 2145220549. The reversal of 2145220543 is 3450225412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2145220543 - 2⁹ = 2145220031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2145220549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072610271 + 1072610272.

It is an arithmetic number, because the mean of its divisors is an integer number (1072610272).

Almost surely, 2^2145220543 is an apocalyptic number.

2145220543 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145220543 is an equidigital number, since it uses as much as digits as its factorization.

2145220543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 2145220543 is about 46316.5255929242. The cubic root of 2145220543 is about 1289.7057885217.

Adding to 2145220543 its reverse (3450225412), we get a palindrome (5595445955).

The spelling of 2145220543 in words is "two billion, one hundred forty-five million, two hundred twenty thousand, five hundred forty-three".