133506535 has 4 divisors (see below), whose sum is σ = 160207848. Its totient is φ = 106805224.

The previous prime is 133506493. The next prime is 133506551. The reversal of 133506535 is 535605331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 535605331 = 19373 ⋅27647.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133506535 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133506497 and 133506506.

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, 13350649 + ... + 13350658.

It is an arithmetic number, because the mean of its divisors is an integer number (40051962).

Almost surely, 2^133506535 is an apocalyptic number.

133506535 is a deficient number, since it is larger than the sum of its proper divisors (26701313).

133506535 is an equidigital number, since it uses as much as digits as its factorization.

133506535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26701312.

The product of its (nonzero) digits is 20250, while the sum is 31.

The square root of 133506535 is about 11554.5028019383. The cubic root of 133506535 is about 511.0940693313.

The spelling of 133506535 in words is "one hundred thirty-three million, five hundred six thousand, five hundred thirty-five".