133430521 has 32 divisors (see below), whose sum is σ = 170864640. Its totient is φ = 101559744.

The previous prime is 133430503. The next prime is 133430527. The reversal of 133430521 is 125034331.

It is a cyclic number.

It is not a de Polignac number, because 133430521 - 2⁹ = 133430009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133430492 and 133430501.

It is not an unprimeable number, because it can be changed into a prime (133430527) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 161716 + ... + 162538.

It is an arithmetic number, because the mean of its divisors is an integer number (5339520).

Almost surely, 2^133430521 is an apocalyptic number.

It is an amenable number.

133430521 is a deficient number, since it is larger than the sum of its proper divisors (37434119).

133430521 is a wasteful number, since it uses less digits than its factorization.

133430521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 133430521 is about 11551.2129666109. The cubic root of 133430521 is about 510.9970511585.

Adding to 133430521 its reverse (125034331), we get a palindrome (258464852).

The spelling of 133430521 in words is "one hundred thirty-three million, four hundred thirty thousand, five hundred twenty-one".