320745131 has 16 divisors (see below), whose sum is σ = 374822400. Its totient is φ = 274354920.

The previous prime is 320745121. The next prime is 320745149. The reversal of 320745131 is 131547023.

It is not a de Polignac number, because 320745131 - 2⁶ = 320745067 is a prime.

It is a super-2 number, since 2×320745131² = 205754878120414322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320745131.

It is not an unprimeable number, because it can be changed into a prime (320745121) 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, 310586 + ... + 311616.

It is an arithmetic number, because the mean of its divisors is an integer number (23426400).

Almost surely, 2^320745131 is an apocalyptic number.

320745131 is a deficient number, since it is larger than the sum of its proper divisors (54077269).

320745131 is an equidigital number, since it uses as much as digits as its factorization.

320745131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1959 (or 1945 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 320745131 is about 17909.3587545730. The cubic root of 320745131 is about 684.5208655009.

The spelling of 320745131 in words is "three hundred twenty million, seven hundred forty-five thousand, one hundred thirty-one".