133431012523 has 4 divisors (see below), whose sum is σ = 133628104800. Its totient is φ = 133233920248.

The previous prime is 133431012521. The next prime is 133431012551. The reversal of 133431012523 is 325210134331.

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

It is a cyclic number.

It is not a de Polignac number, because 133431012523 - 2¹ = 133431012521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133431012491 and 133431012500.

It is not an unprimeable number, because it can be changed into a prime (133431012521) 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, 98545123 + ... + 98546476.

It is an arithmetic number, because the mean of its divisors is an integer number (33407026200).

Almost surely, 2^133431012523 is an apocalyptic number.

133431012523 is a deficient number, since it is larger than the sum of its proper divisors (197092277).

133431012523 is an equidigital number, since it uses as much as digits as its factorization.

133431012523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197092276.

The product of its (nonzero) digits is 6480, while the sum is 28.

Adding to 133431012523 its reverse (325210134331), we get a palindrome (458641146854).

The spelling of 133431012523 in words is "one hundred thirty-three billion, four hundred thirty-one million, twelve thousand, five hundred twenty-three".