15871587287243 has 2 divisors, whose sum is σ = 15871587287244. Its totient is φ = 15871587287242.

The previous prime is 15871587287189. The next prime is 15871587287261. The reversal of 15871587287243 is 34278278517851.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15871587287243 - 2³² = 15867292319947 is a prime.

It is a super-2 number, since 2×15871587287243² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15871587287263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7935793643621 + 7935793643622.

It is an arithmetic number, because the mean of its divisors is an integer number (7935793643622).

Almost surely, 2^{15871587287243} is an apocalyptic number.

15871587287243 is a deficient number, since it is larger than the sum of its proper divisors (1).

15871587287243 is an equidigital number, since it uses as much as digits as its factorization.

15871587287243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 210739200, while the sum is 68.

The spelling of 15871587287243 in words is "fifteen trillion, eight hundred seventy-one billion, five hundred eighty-seven million, two hundred eighty-seven thousand, two hundred forty-three".