133530525 has 120 divisors (see below), whose sum is σ = 267911424. Its totient is φ = 65577600.

The previous prime is 133530503. The next prime is 133530533. The reversal of 133530525 is 525035331.

133530525 is a `hidden beast` number, since 1 + 335 + 305 + 25 = 666.

It is not a de Polignac number, because 133530525 - 2⁹ = 133530013 is a prime.

It is a super-2 number, since 2×133530525² = 35660802213551250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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 119 ways as a sum of consecutive naturals, for example, 2188995 + ... + 2189055.

Almost surely, 2^133530525 is an apocalyptic number.

133530525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133530525 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

133530525 is a wasteful number, since it uses less digits than its factorization.

133530525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 6750, while the sum is 27.

The square root of 133530525 is about 11555.5408787300. The cubic root of 133530525 is about 511.1246805979.

Adding to 133530525 its reverse (525035331), we get a palindrome (658565856).

The spelling of 133530525 in words is "one hundred thirty-three million, five hundred thirty thousand, five hundred twenty-five".