2175139643 has 2 divisors, whose sum is σ = 2175139644. Its totient is φ = 2175139642.

The previous prime is 2175139633. The next prime is 2175139679. The reversal of 2175139643 is 3469315712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2175139643 - 2¹⁶ = 2175074107 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2175139643.

It is not a weakly prime, because it can be changed into another prime (2175139633) 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, 1087569821 + 1087569822.

It is an arithmetic number, because the mean of its divisors is an integer number (1087569822).

Almost surely, 2^2175139643 is an apocalyptic number.

2175139643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2175139643 is an equidigital number, since it uses as much as digits as its factorization.

2175139643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 41.

The square root of 2175139643 is about 46638.3923715216. The cubic root of 2175139643 is about 1295.6739122933.

The spelling of 2175139643 in words is "two billion, one hundred seventy-five million, one hundred thirty-nine thousand, six hundred forty-three".