133321528 has 16 divisors (see below), whose sum is σ = 253499760. Its totient is φ = 65721600.

The previous prime is 133321519. The next prime is 133321561. The reversal of 133321528 is 825123331.

133321528 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 133321496 and 133321505.

It is a congruent number.

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, 116793 + ... + 117928.

It is an arithmetic number, because the mean of its divisors is an integer number (15843735).

Almost surely, 2^133321528 is an apocalyptic number.

It is an amenable number.

133321528 is a deficient number, since it is larger than the sum of its proper divisors (120178232).

133321528 is a wasteful number, since it uses less digits than its factorization.

133321528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234798 (or 234794 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 133321528 is about 11546.4941865486. The cubic root of 133321528 is about 510.8578769202.

Adding to 133321528 its reverse (825123331), we get a palindrome (958444859).

The spelling of 133321528 in words is "one hundred thirty-three million, three hundred twenty-one thousand, five hundred twenty-eight".