133506523 has 8 divisors (see below), whose sum is σ = 136401408. Its totient is φ = 130625664.

The previous prime is 133506493. The next prime is 133506551. The reversal of 133506523 is 325605331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133506523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133506491 and 133506500.

It is not an unprimeable number, because it can be changed into a prime (133506623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17011 + ... + 23587.

It is an arithmetic number, because the mean of its divisors is an integer number (17050176).

Almost surely, 2^133506523 is an apocalyptic number.

133506523 is a deficient number, since it is larger than the sum of its proper divisors (2894885).

133506523 is an equidigital number, since it uses as much as digits as its factorization.

133506523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7013.

The product of its (nonzero) digits is 8100, while the sum is 28.

The square root of 133506523 is about 11554.5022826602. The cubic root of 133506523 is about 511.0940540184.

The spelling of 133506523 in words is "one hundred thirty-three million, five hundred six thousand, five hundred twenty-three".