115218543 has 16 divisors (see below), whose sum is σ = 171490176. Its totient is φ = 68204640.

The previous prime is 115218539. The next prime is 115218547. The reversal of 115218543 is 345812511.

It is an interprime number because it is at equal distance from previous prime (115218539) and next prime (115218547).

It is not a de Polignac number, because 115218543 - 2² = 115218539 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 115218543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115218547) 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, 39180 + ... + 42017.

It is an arithmetic number, because the mean of its divisors is an integer number (10718136).

Almost surely, 2^115218543 is an apocalyptic number.

115218543 is a deficient number, since it is larger than the sum of its proper divisors (56271633).

115218543 is a wasteful number, since it uses less digits than its factorization.

115218543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81254.

The product of its digits is 4800, while the sum is 30.

The square root of 115218543 is about 10733.9900782514. The cubic root of 115218543 is about 486.6022652526.

The spelling of 115218543 in words is "one hundred fifteen million, two hundred eighteen thousand, five hundred forty-three".