133528547 has 4 divisors (see below), whose sum is σ = 139334160. Its totient is φ = 127722936.

The previous prime is 133528517. The next prime is 133528553. The reversal of 133528547 is 745825331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 133528547 - 2¹⁰ = 133527523 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133528547.

It is not an unprimeable number, because it can be changed into a prime (133528517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2902772 + ... + 2902817.

It is an arithmetic number, because the mean of its divisors is an integer number (34833540).

Almost surely, 2^133528547 is an apocalyptic number.

133528547 is a deficient number, since it is larger than the sum of its proper divisors (5805613).

133528547 is an equidigital number, since it uses as much as digits as its factorization.

133528547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5805612.

The product of its digits is 100800, while the sum is 38.

The square root of 133528547 is about 11555.4552917659. The cubic root of 133528547 is about 511.1221568064.

The spelling of 133528547 in words is "one hundred thirty-three million, five hundred twenty-eight thousand, five hundred forty-seven".