320401131 has 4 divisors (see below), whose sum is σ = 427201512. Its totient is φ = 213600752.

The previous prime is 320401117. The next prime is 320401139. The reversal of 320401131 is 131104023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131104023 = 3 ⋅43701341.

It is a cyclic number.

It is not a de Polignac number, because 320401131 - 2⁵ = 320401099 is a prime.

It is a super-2 number, since 2×320401131² = 205313769492158322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 320401131.

It is not an unprimeable number, because it can be changed into a prime (320401139) 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 3 ways as a sum of consecutive naturals, for example, 53400186 + ... + 53400191.

It is an arithmetic number, because the mean of its divisors is an integer number (106800378).

Almost surely, 2^320401131 is an apocalyptic number.

320401131 is a deficient number, since it is larger than the sum of its proper divisors (106800381).

320401131 is a wasteful number, since it uses less digits than its factorization.

320401131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106800380.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 320401131 is about 17899.7522608555. The cubic root of 320401131 is about 684.2760611503.

Adding to 320401131 its reverse (131104023), we get a palindrome (451505154).

The spelling of 320401131 in words is "three hundred twenty million, four hundred one thousand, one hundred thirty-one".