320133813 has 16 divisors (see below), whose sum is σ = 442159680. Its totient is φ = 205785216.

The previous prime is 320133809. The next prime is 320133829. The reversal of 320133813 is 318331023.

It is not a de Polignac number, because 320133813 - 2² = 320133809 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320133893) 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, 76881 + ... + 80937.

It is an arithmetic number, because the mean of its divisors is an integer number (27634980).

Almost surely, 2^320133813 is an apocalyptic number.

It is an amenable number.

320133813 is a deficient number, since it is larger than the sum of its proper divisors (122025867).

320133813 is a wasteful number, since it uses less digits than its factorization.

320133813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4996.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 320133813 is about 17892.2836161290. The cubic root of 320133813 is about 684.0857058058.

Adding to 320133813 its reverse (318331023), we get a palindrome (638464836).

The spelling of 320133813 in words is "three hundred twenty million, one hundred thirty-three thousand, eight hundred thirteen".