135312223423 has 16 divisors (see below), whose sum is σ = 150451603456. Its totient is φ = 120850276320.

The previous prime is 135312223393. The next prime is 135312223457. The reversal of 135312223423 is 324322213531.

It is a cyclic number.

It is not a de Polignac number, because 135312223423 - 2²¹ = 135310126271 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135312223463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2162686 + ... + 2224372.

It is an arithmetic number, because the mean of its divisors is an integer number (9403225216).

Almost surely, 2^135312223423 is an apocalyptic number.

135312223423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

135312223423 is a deficient number, since it is larger than the sum of its proper divisors (15139380033).

135312223423 is a wasteful number, since it uses less digits than its factorization.

135312223423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67174.

The product of its digits is 25920, while the sum is 31.

Adding to 135312223423 its reverse (324322213531), we get a palindrome (459634436954).

The spelling of 135312223423 in words is "one hundred thirty-five billion, three hundred twelve million, two hundred twenty-three thousand, four hundred twenty-three".