8133520 has 40 divisors (see below), whose sum is σ = 19909440. Its totient is φ = 3081600.

The previous prime is 8133511. The next prime is 8133527. The reversal of 8133520 is 253318.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 8133491 and 8133500.

It is not an unprimeable number, because it can be changed into a prime (8133527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1156 + ... + 4195.

It is an arithmetic number, because the mean of its divisors is an integer number (497736).

Almost surely, 2^8133520 is an apocalyptic number.

8133520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8133520 is an abundant number, since it is smaller than the sum of its proper divisors (11775920).

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

8133520 is a wasteful number, since it uses less digits than its factorization.

8133520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5383 (or 5377 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 8133520 is about 2851.9326780273. The cubic root of 8133520 is about 201.1065332965.

Adding to 8133520 its reverse (253318), we get a palindrome (8386838).

The spelling of 8133520 in words is "eight million, one hundred thirty-three thousand, five hundred twenty".