2158823543 has 2 divisors, whose sum is σ = 2158823544. Its totient is φ = 2158823542.

The previous prime is 2158823519. The next prime is 2158823581. The reversal of 2158823543 is 3453288512.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2158823543 is a prime.

It is a super-2 number, since 2×2158823543² = 9321038179622145698, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2158823543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2158828543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1079411771 + 1079411772.

It is an arithmetic number, because the mean of its divisors is an integer number (1079411772).

Almost surely, 2^2158823543 is an apocalyptic number.

2158823543 is a deficient number, since it is larger than the sum of its proper divisors (1).

2158823543 is an equidigital number, since it uses as much as digits as its factorization.

2158823543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 230400, while the sum is 41.

The square root of 2158823543 is about 46463.1417685029. The cubic root of 2158823543 is about 1292.4260862346.

The spelling of 2158823543 in words is "two billion, one hundred fifty-eight million, eight hundred twenty-three thousand, five hundred forty-three".