320204131 has 12 divisors (see below), whose sum is σ = 364982520. Its totient is φ = 280013760.

The previous prime is 320204119. The next prime is 320204149. The reversal of 320204131 is 131402023.

It is a happy number.

It is not a de Polignac number, because 320204131 - 2¹⁵ = 320171363 is a prime.

It is a super-2 number, since 2×320204131² = 205061371018930322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320204161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46650 + ... + 53071.

It is an arithmetic number, because the mean of its divisors is an integer number (30415210).

Almost surely, 2^320204131 is an apocalyptic number.

320204131 is a deficient number, since it is larger than the sum of its proper divisors (44778389).

320204131 is a wasteful number, since it uses less digits than its factorization.

320204131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99766 (or 99753 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 320204131 is about 17894.2485452729. The cubic root of 320204131 is about 684.1357890472.

Adding to 320204131 its reverse (131402023), we get a palindrome (451606154).

The spelling of 320204131 in words is "three hundred twenty million, two hundred four thousand, one hundred thirty-one".