320220131 has 16 divisors (see below), whose sum is σ = 403729920. Its totient is φ = 246713280.

The previous prime is 320220119. The next prime is 320220137. The reversal of 320220131 is 131022023.

It is a happy number.

It is not a de Polignac number, because 320220131 - 2¹⁴ = 320203747 is a prime.

It is a super-2 number, since 2×320220131² = 205081864595314322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (320220137) 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, 16511 + ... + 30216.

It is an arithmetic number, because the mean of its divisors is an integer number (25233120).

Almost surely, 2^320220131 is an apocalyptic number.

320220131 is a deficient number, since it is larger than the sum of its proper divisors (83509789).

320220131 is a wasteful number, since it uses less digits than its factorization.

320220131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46834.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 320220131 is about 17894.6956107110. The cubic root of 320220131 is about 684.1471838516.

Adding to 320220131 its reverse (131022023), we get a palindrome (451242154).

The spelling of 320220131 in words is "three hundred twenty million, two hundred twenty thousand, one hundred thirty-one".