133033220 has 12 divisors (see below), whose sum is σ = 279369804. Its totient is φ = 53213280.

The previous prime is 133033217. The next prime is 133033247. The reversal of 133033220 is 22330331.

It can be written as a sum of positive squares in 2 ways, for example, as 47803396 + 85229824 = 6914^2 + 9232^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3325811 + ... + 3325850.

It is an arithmetic number, because the mean of its divisors is an integer number (23280817).

Almost surely, 2^133033220 is an apocalyptic number.

133033220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133033220 is an abundant number, since it is smaller than the sum of its proper divisors (146336584).

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

133033220 is a wasteful number, since it uses less digits than its factorization.

133033220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6651670 (or 6651668 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 17.

The square root of 133033220 is about 11534.0027744058. The cubic root of 133033220 is about 510.4893675221.

Adding to 133033220 its reverse (22330331), we get a palindrome (155363551).

The spelling of 133033220 in words is "one hundred thirty-three million, thirty-three thousand, two hundred twenty".