320520011 has 8 divisors (see below), whose sum is σ = 376209120. Its totient is φ = 267306048.

The previous prime is 320520007. The next prime is 320520017. The reversal of 320520011 is 110025023.

It is a happy number.

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 320520011 - 2² = 320520007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320520017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 618506 + ... + 619023.

It is an arithmetic number, because the mean of its divisors is an integer number (47026140).

Almost surely, 2^320520011 is an apocalyptic number.

320520011 is a deficient number, since it is larger than the sum of its proper divisors (55689109).

320520011 is a wasteful number, since it uses less digits than its factorization.

320520011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237573.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 320520011 is about 17903.0726692375. The cubic root of 320520011 is about 684.3606807843.

Adding to 320520011 its reverse (110025023), we get a palindrome (430545034).

The spelling of 320520011 in words is "three hundred twenty million, five hundred twenty thousand, eleven".