2115251552543 has 4 divisors (see below), whose sum is σ = 2115325803000. Its totient is φ = 2115177302088.

The previous prime is 2115251552537. The next prime is 2115251552549. The reversal of 2115251552543 is 3452551525112.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2115251552537) and next prime (2115251552549).

It is a cyclic number.

It is not a de Polignac number, because 2115251552543 - 2¹⁰ = 2115251551519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2115251552543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2115251552549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37082480 + ... + 37139477.

It is an arithmetic number, because the mean of its divisors is an integer number (528831450750).

Almost surely, 2^{2115251552543} is an apocalyptic number.

2115251552543 is a deficient number, since it is larger than the sum of its proper divisors (74250457).

2115251552543 is an equidigital number, since it uses as much as digits as its factorization.

2115251552543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74250456.

The product of its digits is 300000, while the sum is 41.

The spelling of 2115251552543 in words is "two trillion, one hundred fifteen billion, two hundred fifty-one million, five hundred fifty-two thousand, five hundred forty-three".