133220528 has 20 divisors (see below), whose sum is σ = 294988560. Its totient is φ = 57094464.

The previous prime is 133220459. The next prime is 133220543. The reversal of 133220528 is 825022331.

It is a junction number, because it is equal to n+sod(n) for n = 133220497 and 133220506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 594623 + ... + 594846.

It is an arithmetic number, because the mean of its divisors is an integer number (14749428).

Almost surely, 2^133220528 is an apocalyptic number.

It is an amenable number.

133220528 is an abundant number, since it is smaller than the sum of its proper divisors (161768032).

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

133220528 is a wasteful number, since it uses less digits than its factorization.

133220528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1189484 (or 1189478 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 133220528 is about 11542.1197359930. The cubic root of 133220528 is about 510.7288412945.

Adding to 133220528 its reverse (825022331), we get a palindrome (958242859).

The spelling of 133220528 in words is "one hundred thirty-three million, two hundred twenty thousand, five hundred twenty-eight".