13525303220 has 96 divisors (see below), whose sum is σ = 33567367680. Its totient is φ = 4539799680.

The previous prime is 13525303171. The next prime is 13525303279. The reversal of 13525303220 is 2230352531.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 13525303220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 469349 + ... + 497331.

It is an arithmetic number, because the mean of its divisors is an integer number (349660080).

Almost surely, 2^13525303220 is an apocalyptic number.

13525303220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13525303220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16783683840).

13525303220 is an abundant number, since it is smaller than the sum of its proper divisors (20042064460).

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

13525303220 is a wasteful number, since it uses less digits than its factorization.

13525303220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28042 (or 28014 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 26.

Adding to 13525303220 its reverse (2230352531), we get a palindrome (15755655751).

The spelling of 13525303220 in words is "thirteen billion, five hundred twenty-five million, three hundred three thousand, two hundred twenty".