133524321 has 16 divisors (see below), whose sum is σ = 207796224. Its totient is φ = 74675664.

The previous prime is 133524319. The next prime is 133524329. The reversal of 133524321 is 123425331.

It is not a de Polignac number, because 133524321 - 2¹ = 133524319 is a prime.

It is a super-2 number, since 2×133524321² = 35657488597022082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 133524291 and 133524300.

It is not an unprimeable number, because it can be changed into a prime (133524329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66655 + ... + 68628.

It is an arithmetic number, because the mean of its divisors is an integer number (12987264).

Almost surely, 2^133524321 is an apocalyptic number.

It is an amenable number.

133524321 is a deficient number, since it is larger than the sum of its proper divisors (74271903).

133524321 is a wasteful number, since it uses less digits than its factorization.

133524321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135340.

The product of its digits is 2160, while the sum is 24.

The square root of 133524321 is about 11555.2724329632. The cubic root of 133524321 is about 511.1167646385.

Adding to 133524321 its reverse (123425331), we get a palindrome (256949652).

The spelling of 133524321 in words is "one hundred thirty-three million, five hundred twenty-four thousand, three hundred twenty-one".