320540131 has 8 divisors (see below), whose sum is σ = 327816720. Its totient is φ = 313309152.

The previous prime is 320540119. The next prime is 320540137. The reversal of 320540131 is 131045023.

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 320540131 - 2¹⁷ = 320409059 is a prime.

It is a super-2 number, since 2×320540131² = 205491951162994322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320540099 and 320540108.

It is not an unprimeable number, because it can be changed into a prime (320540137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3016 + ... + 25498.

It is an arithmetic number, because the mean of its divisors is an integer number (40977090).

Almost surely, 2^320540131 is an apocalyptic number.

320540131 is a deficient number, since it is larger than the sum of its proper divisors (7276589).

320540131 is a wasteful number, since it uses less digits than its factorization.

320540131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22805.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 320540131 is about 17903.6345751359. The cubic root of 320540131 is about 684.3750002738.

Adding to 320540131 its reverse (131045023), we get a palindrome (451585154).

The spelling of 320540131 in words is "three hundred twenty million, five hundred forty thousand, one hundred thirty-one".