133731525 has 12 divisors (see below), whose sum is σ = 221102912. Its totient is φ = 71323440.

The previous prime is 133731517. The next prime is 133731527. The reversal of 133731525 is 525137331.

It is not a de Polignac number, because 133731525 - 2³ = 133731517 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133731492 and 133731501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133731527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 891469 + ... + 891618.

Almost surely, 2^133731525 is an apocalyptic number.

133731525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133731525 is a deficient number, since it is larger than the sum of its proper divisors (87371387).

133731525 is a wasteful number, since it uses less digits than its factorization.

133731525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1783100 (or 1783095 counting only the distinct ones).

The product of its digits is 9450, while the sum is 30.

The square root of 133731525 is about 11564.2347347328. The cubic root of 133731525 is about 511.3810128865.

Adding to 133731525 its reverse (525137331), we get a palindrome (658868856).

The spelling of 133731525 in words is "one hundred thirty-three million, seven hundred thirty-one thousand, five hundred twenty-five".