133320220 has 72 divisors (see below), whose sum is σ = 311698800. Its totient is φ = 47857920.

The previous prime is 133320211. The next prime is 133320227. The reversal of 133320220 is 22023331.

It is a junction number, because it is equal to n+sod(n) for n = 133320194 and 133320203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133320227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 215071 + ... + 215689.

It is an arithmetic number, because the mean of its divisors is an integer number (4329150).

Almost surely, 2^133320220 is an apocalyptic number.

133320220 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 133320220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155849400).

133320220 is an abundant number, since it is smaller than the sum of its proper divisors (178378580).

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

133320220 is a wasteful number, since it uses less digits than its factorization.

133320220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739 (or 726 counting only the distinct ones).

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

The square root of 133320220 is about 11546.4375458407. The cubic root of 133320220 is about 510.8562062616.

Adding to 133320220 its reverse (22023331), we get a palindrome (155343551).

It can be divided in two parts, 13 and 3320220, that added together give a palindrome (3320233).

The spelling of 133320220 in words is "one hundred thirty-three million, three hundred twenty thousand, two hundred twenty".