13233220 has 96 divisors (see below), whose sum is σ = 37368576. Its totient is φ = 3801600.

The previous prime is 13233203. The next prime is 13233229. The reversal of 13233220 is 2233231.

It is a super-2 number, since 2×13233220² = 350236223136800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13233194 and 13233203.

It is not an unprimeable number, because it can be changed into a prime (13233229) 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 31 ways as a sum of consecutive naturals, for example, 19690 + ... + 20350.

It is an arithmetic number, because the mean of its divisors is an integer number (389256).

Almost surely, 2^13233220 is an apocalyptic number.

13233220 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 13233220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18684288).

13233220 is an abundant number, since it is smaller than the sum of its proper divisors (24135356).

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

13233220 is a wasteful number, since it uses less digits than its factorization.

13233220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701 (or 699 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 13233220 is about 3637.7493041715. The cubic root of 13233220 is about 236.5312412635.

Adding to 13233220 its reverse (2233231), we get a palindrome (15466451).

The spelling of 13233220 in words is "thirteen million, two hundred thirty-three thousand, two hundred twenty".