133405525 has 18 divisors (see below), whose sum is σ = 181832546. Its totient is φ = 97020000.

The previous prime is 133405501. The next prime is 133405541. The reversal of 133405525 is 525504331.

It can be written as a sum of positive squares in 3 ways, for example, as 47416996 + 85988529 = 6886^2 + 9273^2 .

It is not a de Polignac number, because 133405525 - 2⁷ = 133405397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133405493 and 133405502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 19026 + ... + 25075.

Almost surely, 2^133405525 is an apocalyptic number.

It is an amenable number.

133405525 is a deficient number, since it is larger than the sum of its proper divisors (48427021).

133405525 is a wasteful number, since it uses less digits than its factorization.

133405525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44133 (or 44117 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 133405525 is about 11550.1309516386. The cubic root of 133405525 is about 510.9651402187.

Adding to 133405525 its reverse (525504331), we get a palindrome (658909856).

The spelling of 133405525 in words is "one hundred thirty-three million, four hundred five thousand, five hundred twenty-five".