133545512523 has 4 divisors (see below), whose sum is σ = 178060683368. Its totient is φ = 89030341680.

The previous prime is 133545512521. The next prime is 133545512593. The reversal of 133545512523 is 325215545331.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 133545512523 - 2¹ = 133545512521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133545512521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22257585418 + ... + 22257585423.

It is an arithmetic number, because the mean of its divisors is an integer number (44515170842).

Almost surely, 2^133545512523 is an apocalyptic number.

133545512523 is a deficient number, since it is larger than the sum of its proper divisors (44515170845).

133545512523 is an equidigital number, since it uses as much as digits as its factorization.

133545512523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44515170844.

The product of its digits is 270000, while the sum is 39.

The spelling of 133545512523 in words is "one hundred thirty-three billion, five hundred forty-five million, five hundred twelve thousand, five hundred twenty-three".