133681535 has 24 divisors (see below), whose sum is σ = 174634704. Its totient is φ = 98192640.

The previous prime is 133681519. The next prime is 133681547. The reversal of 133681535 is 535186331.

It is not a de Polignac number, because 133681535 - 2⁴ = 133681519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133681495 and 133681504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 237164 + ... + 237726.

It is an arithmetic number, because the mean of its divisors is an integer number (7276446).

Almost surely, 2^133681535 is an apocalyptic number.

133681535 is a deficient number, since it is larger than the sum of its proper divisors (40953169).

133681535 is a wasteful number, since it uses less digits than its factorization.

133681535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875 (or 862 counting only the distinct ones).

The product of its digits is 32400, while the sum is 35.

The square root of 133681535 is about 11562.0731272553. The cubic root of 133681535 is about 511.3172853976.

The spelling of 133681535 in words is "one hundred thirty-three million, six hundred eighty-one thousand, five hundred thirty-five".