2115131543 has 16 divisors (see below), whose sum is σ = 2554337280. Its totient is φ = 1712183616.

The previous prime is 2115131539. The next prime is 2115131587. The reversal of 2115131543 is 3451315112.

It is a cyclic number.

It is not a de Polignac number, because 2115131543 - 2² = 2115131539 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2115131743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70430 + ... + 95867.

It is an arithmetic number, because the mean of its divisors is an integer number (159646080).

Almost surely, 2^2115131543 is an apocalyptic number.

2115131543 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2115131543 is a deficient number, since it is larger than the sum of its proper divisors (439205737).

2115131543 is a wasteful number, since it uses less digits than its factorization.

2115131543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166406.

The product of its digits is 1800, while the sum is 26.

The square root of 2115131543 is about 45990.5592812264. The cubic root of 2115131543 is about 1283.6475433174.

Adding to 2115131543 its reverse (3451315112), we get a palindrome (5566446655).

The spelling of 2115131543 in words is "two billion, one hundred fifteen million, one hundred thirty-one thousand, five hundred forty-three".