135444321233 has 8 divisors (see below), whose sum is σ = 146276330088. Its totient is φ = 124671343104.

The previous prime is 135444321223. The next prime is 135444321263. The reversal of 135444321233 is 332123444531.

It can be written as a sum of positive squares in 4 ways, for example, as 14888148289 + 120556172944 = 122017^2 + 347212^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135444321233 - 2²⁴ = 135427544017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135444321193 and 135444321202.

It is not an unprimeable number, because it can be changed into a prime (135444321223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14752910 + ... + 14762087.

It is an arithmetic number, because the mean of its divisors is an integer number (18284541261).

Almost surely, 2^135444321233 is an apocalyptic number.

135444321233 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

135444321233 is a deficient number, since it is larger than the sum of its proper divisors (10832008855).

135444321233 is a wasteful number, since it uses less digits than its factorization.

135444321233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29515363.

The product of its digits is 103680, while the sum is 35.

Adding to 135444321233 its reverse (332123444531), we get a palindrome (467567765764).

The spelling of 135444321233 in words is "one hundred thirty-five billion, four hundred forty-four million, three hundred twenty-one thousand, two hundred thirty-three".