102521530452 has 48 divisors (see below), whose sum is σ = 269962660800. Its totient is φ = 29995848960.

The previous prime is 102521530451. The next prime is 102521530523. The reversal of 102521530452 is 254035125201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102521530451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13387177 + ... + 13394832.

It is an arithmetic number, because the mean of its divisors is an integer number (5624222100).

Almost surely, 2^102521530452 is an apocalyptic number.

102521530452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

102521530452 is an abundant number, since it is smaller than the sum of its proper divisors (167441130348).

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

102521530452 is a wasteful number, since it uses less digits than its factorization.

102521530452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26782056 (or 26782054 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 102521530452 its reverse (254035125201), we get a palindrome (356556655653).

The spelling of 102521530452 in words is "one hundred two billion, five hundred twenty-one million, five hundred thirty thousand, four hundred fifty-two".