102523120520 has 16 divisors (see below), whose sum is σ = 230677021260. Its totient is φ = 41009248192.

The previous prime is 102523120519. The next prime is 102523120537. The reversal of 102523120520 is 25021325201.

It can be written as a sum of positive squares in 2 ways, for example, as 97657500004 + 4865620516 = 312502^2 + 69754^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1281538967 + ... + 1281539046.

Almost surely, 2^102523120520 is an apocalyptic number.

102523120520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102523120520 is an abundant number, since it is smaller than the sum of its proper divisors (128153900740).

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

102523120520 is a wasteful number, since it uses less digits than its factorization.

102523120520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2563078024 (or 2563078020 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 102523120520 its reverse (25021325201), we get a palindrome (127544445721).

The spelling of 102523120520 in words is "one hundred two billion, five hundred twenty-three million, one hundred twenty thousand, five hundred twenty".