13133320 has 16 divisors (see below), whose sum is σ = 29550060. Its totient is φ = 5253312.

The previous prime is 13133311. The next prime is 13133321. The reversal of 13133320 is 2333131.

It can be written as a sum of positive squares in 2 ways, for example, as 11847364 + 1285956 = 3442^2 + 1134^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13133294 and 13133303.

It is not an unprimeable number, because it can be changed into a prime (13133321) 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, 164127 + ... + 164206.

Almost surely, 2^13133320 is an apocalyptic number.

13133320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13133320 is an abundant number, since it is smaller than the sum of its proper divisors (16416740).

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

13133320 is a wasteful number, since it uses less digits than its factorization.

13133320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328344 (or 328340 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 16.

The square root of 13133320 is about 3623.9922737224. The cubic root of 13133320 is about 235.9345312990.

Adding to 13133320 its reverse (2333131), we get a palindrome (15466451).

The spelling of 13133320 in words is "thirteen million, one hundred thirty-three thousand, three hundred twenty".