8113520 has 20 divisors (see below), whose sum is σ = 18864120. Its totient is φ = 3245376.

The previous prime is 8113519. The next prime is 8113529. The reversal of 8113520 is 253118.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 8113492 and 8113501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8113529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50630 + ... + 50789.

It is an arithmetic number, because the mean of its divisors is an integer number (943206).

Almost surely, 2^8113520 is an apocalyptic number.

8113520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8113520 is an abundant number, since it is smaller than the sum of its proper divisors (10750600).

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

8113520 is a wasteful number, since it uses less digits than its factorization.

8113520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101432 (or 101426 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 8113520 is about 2848.4241257229. The cubic root of 8113520 is about 200.9415603643.

Adding to 8113520 its reverse (253118), we get a palindrome (8366638).

The spelling of 8113520 in words is "eight million, one hundred thirteen thousand, five hundred twenty".