102115543 has 4 divisors (see below), whose sum is σ = 104606208. Its totient is φ = 99624880.

The previous prime is 102115483. The next prime is 102115547. The reversal of 102115543 is 345511201.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 102115543 - 2⁹ = 102115031 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 (102115547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1245271 + ... + 1245352.

It is an arithmetic number, because the mean of its divisors is an integer number (26151552).

Almost surely, 2^102115543 is an apocalyptic number.

102115543 is a deficient number, since it is larger than the sum of its proper divisors (2490665).

102115543 is an equidigital number, since it uses as much as digits as its factorization.

102115543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2490664.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 102115543 is about 10105.2235502239. The cubic root of 102115543 is about 467.4092294244.

Adding to 102115543 its reverse (345511201), we get a palindrome (447626744).

The spelling of 102115543 in words is "one hundred two million, one hundred fifteen thousand, five hundred forty-three".