133137528 has 16 divisors (see below), whose sum is σ = 332843880. Its totient is φ = 44379168.

The previous prime is 133137517. The next prime is 133137539. The reversal of 133137528 is 825731331.

It is an interprime number because it is at equal distance from previous prime (133137517) and next prime (133137539).

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, 2773675 + ... + 2773722.

Almost surely, 2^133137528 is an apocalyptic number.

It is an amenable number.

133137528 is an abundant number, since it is smaller than the sum of its proper divisors (199706352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133137528 is a wasteful number, since it uses less digits than its factorization.

133137528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5547406 (or 5547402 counting only the distinct ones).

The product of its digits is 15120, while the sum is 33.

The square root of 133137528 is about 11538.5236490636. The cubic root of 133137528 is about 510.6227532889.

Adding to 133137528 its reverse (825731331), we get a palindrome (958868859).

The spelling of 133137528 in words is "one hundred thirty-three million, one hundred thirty-seven thousand, five hundred twenty-eight".