133542030521 has 4 divisors (see below), whose sum is σ = 133560556944. Its totient is φ = 133523504100.

The previous prime is 133542030511. The next prime is 133542030527. The reversal of 133542030521 is 125030245331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 125030245331 = 103 ⋅1213885877.

It is a cyclic number.

It is not a de Polignac number, because 133542030521 - 2¹⁰ = 133542029497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133542030527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9252395 + ... + 9266816.

It is an arithmetic number, because the mean of its divisors is an integer number (33390139236).

Almost surely, 2^133542030521 is an apocalyptic number.

It is an amenable number.

133542030521 is a deficient number, since it is larger than the sum of its proper divisors (18526423).

133542030521 is an equidigital number, since it uses as much as digits as its factorization.

133542030521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18526422.

The product of its (nonzero) digits is 10800, while the sum is 29.

Adding to 133542030521 its reverse (125030245331), we get a palindrome (258572275852).

The spelling of 133542030521 in words is "one hundred thirty-three billion, five hundred forty-two million, thirty thousand, five hundred twenty-one".