133203220 has 12 divisors (see below), whose sum is σ = 279726804. Its totient is φ = 53281280.

The previous prime is 133203193. The next prime is 133203221. The reversal of 133203220 is 22302331.

It can be written as a sum of positive squares in 2 ways, for example, as 22448644 + 110754576 = 4738^2 + 10524^2 .

It is a junction number, because it is equal to n+sod(n) for n = 133203194 and 133203203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133203221) 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, 3330061 + ... + 3330100.

It is an arithmetic number, because the mean of its divisors is an integer number (23310567).

Almost surely, 2^133203220 is an apocalyptic number.

133203220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133203220 is an abundant number, since it is smaller than the sum of its proper divisors (146523584).

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

133203220 is a wasteful number, since it uses less digits than its factorization.

133203220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6660170 (or 6660168 counting only the distinct ones).

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

The square root of 133203220 is about 11541.3699360171. The cubic root of 133203220 is about 510.7067223869.

Adding to 133203220 its reverse (22302331), we get a palindrome (155505551).

The spelling of 133203220 in words is "one hundred thirty-three million, two hundred three thousand, two hundred twenty".