135223112523 has 4 divisors (see below), whose sum is σ = 180297483368. Its totient is φ = 90148741680.

The previous prime is 135223112509. The next prime is 135223112527. The reversal of 135223112523 is 325211322531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 325211322531 = 3 ⋅108403774177.

It is not a de Polignac number, because 135223112523 - 2⁵ = 135223112491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135223112527) 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, 22537185418 + ... + 22537185423.

It is an arithmetic number, because the mean of its divisors is an integer number (45074370842).

Almost surely, 2^135223112523 is an apocalyptic number.

135223112523 is a deficient number, since it is larger than the sum of its proper divisors (45074370845).

135223112523 is an equidigital number, since it uses as much as digits as its factorization.

135223112523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45074370844.

The product of its digits is 10800, while the sum is 30.

The spelling of 135223112523 in words is "one hundred thirty-five billion, two hundred twenty-three million, one hundred twelve thousand, five hundred twenty-three".