113204205520 has 80 divisors (see below), whose sum is σ = 316631341440. Its totient is φ = 36770084352.

The previous prime is 113204205511. The next prime is 113204205523. The reversal of 113204205520 is 25502402311.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113204205523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5309107 + ... + 5330386.

It is an arithmetic number, because the mean of its divisors is an integer number (3957891768).

Almost surely, 2^113204205520 is an apocalyptic number.

113204205520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

113204205520 is an abundant number, since it is smaller than the sum of its proper divisors (203427135920).

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

113204205520 is a wasteful number, since it uses less digits than its factorization.

113204205520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10639532 (or 10639526 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 113204205520 its reverse (25502402311), we get a palindrome (138706607831).

The spelling of 113204205520 in words is "one hundred thirteen billion, two hundred four million, two hundred five thousand, five hundred twenty".