133512315523 has 4 divisors (see below), whose sum is σ = 141365981160. Its totient is φ = 125658649888.

The previous prime is 133512315493. The next prime is 133512315539. The reversal of 133512315523 is 325513215331.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133512315523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133512315583) 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, 3926832793 + ... + 3926832826.

It is an arithmetic number, because the mean of its divisors is an integer number (35341495290).

Almost surely, 2^133512315523 is an apocalyptic number.

133512315523 is a deficient number, since it is larger than the sum of its proper divisors (7853665637).

133512315523 is an equidigital number, since it uses as much as digits as its factorization.

133512315523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7853665636.

The product of its digits is 40500, while the sum is 34.

The spelling of 133512315523 in words is "one hundred thirty-three billion, five hundred twelve million, three hundred fifteen thousand, five hundred twenty-three".