320545031 has 2 divisors, whose sum is σ = 320545032. Its totient is φ = 320545030.

The previous prime is 320545009. The next prime is 320545037. The reversal of 320545031 is 130545023.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 320545031 - 2⁶ = 320544967 is a prime.

It is a super-2 number, since 2×320545031² = 205498233797581922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 320544988 and 320545006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320545037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160272515 + 160272516.

It is an arithmetic number, because the mean of its divisors is an integer number (160272516).

Almost surely, 2^320545031 is an apocalyptic number.

320545031 is a deficient number, since it is larger than the sum of its proper divisors (1).

320545031 is an equidigital number, since it uses as much as digits as its factorization.

320545031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 320545031 is about 17903.7714183353. The cubic root of 320545031 is about 684.3784875339.

The spelling of 320545031 in words is "three hundred twenty million, five hundred forty-five thousand, thirty-one".