133115505423 has 4 divisors (see below), whose sum is σ = 177487340568. Its totient is φ = 88743670280.

The previous prime is 133115505379. The next prime is 133115505443. The reversal of 133115505423 is 324505511331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 324505511331 = 3 ⋅108168503777.

It is a cyclic number.

It is not a de Polignac number, because 133115505423 - 2¹² = 133115501327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133115505443) 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, 22185917568 + ... + 22185917573.

It is an arithmetic number, because the mean of its divisors is an integer number (44371835142).

Almost surely, 2^133115505423 is an apocalyptic number.

133115505423 is a deficient number, since it is larger than the sum of its proper divisors (44371835145).

133115505423 is an equidigital number, since it uses as much as digits as its factorization.

133115505423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44371835144.

The product of its (nonzero) digits is 27000, while the sum is 33.

The spelling of 133115505423 in words is "one hundred thirty-three billion, one hundred fifteen million, five hundred five thousand, four hundred twenty-three".