2173722143 has 2 divisors, whose sum is σ = 2173722144. Its totient is φ = 2173722142.

The previous prime is 2173722097. The next prime is 2173722217. The reversal of 2173722143 is 3412273712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2173722143 - 2¹⁰ = 2173721119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2173725143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086861071 + 1086861072.

It is an arithmetic number, because the mean of its divisors is an integer number (1086861072).

Almost surely, 2^2173722143 is an apocalyptic number.

2173722143 is a deficient number, since it is larger than the sum of its proper divisors (1).

2173722143 is an equidigital number, since it uses as much as digits as its factorization.

2173722143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 32.

The square root of 2173722143 is about 46623.1931875113. The cubic root of 2173722143 is about 1295.3923952139.

Adding to 2173722143 its reverse (3412273712), we get a palindrome (5585995855).

The spelling of 2173722143 in words is "two billion, one hundred seventy-three million, seven hundred twenty-two thousand, one hundred forty-three".