102543240520 has 32 divisors (see below), whose sum is σ = 263682619200. Its totient is φ = 35157682368.

The previous prime is 102543240517. The next prime is 102543240523. The reversal of 102543240520 is 25042345201.

It is an interprime number because it is at equal distance from previous prime (102543240517) and next prime (102543240523).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (102543240523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183112650 + ... + 183113209.

It is an arithmetic number, because the mean of its divisors is an integer number (8240081850).

Almost surely, 2^102543240520 is an apocalyptic number.

102543240520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102543240520 is an abundant number, since it is smaller than the sum of its proper divisors (161139378680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102543240520 is a wasteful number, since it uses less digits than its factorization.

102543240520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366225877 (or 366225873 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 102543240520 its reverse (25042345201), we get a palindrome (127585585721).

The spelling of 102543240520 in words is "one hundred two billion, five hundred forty-three million, two hundred forty thousand, five hundred twenty".