320123135 has 16 divisors (see below), whose sum is σ = 390168576. Its totient is φ = 252115488.

The previous prime is 320123129. The next prime is 320123137. The reversal of 320123135 is 531321023.

It is a cyclic number.

It is not a de Polignac number, because 320123135 - 2⁶ = 320123071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320123137) 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, 87554 + ... + 91136.

It is an arithmetic number, because the mean of its divisors is an integer number (24385536).

Almost surely, 2^320123135 is an apocalyptic number.

320123135 is a deficient number, since it is larger than the sum of its proper divisors (70045441).

320123135 is a wasteful number, since it uses less digits than its factorization.

320123135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3862.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 320123135 is about 17891.9852168506. The cubic root of 320123135 is about 684.0780998734.

Adding to 320123135 its reverse (531321023), we get a palindrome (851444158).

The spelling of 320123135 in words is "three hundred twenty million, one hundred twenty-three thousand, one hundred thirty-five".