320043481 has 2 divisors, whose sum is σ = 320043482. Its totient is φ = 320043480.

The previous prime is 320043463. The next prime is 320043497. The reversal of 320043481 is 184340023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 217710025 + 102333456 = 14755^2 + 10116^2 .

It is a cyclic number.

It is not a de Polignac number, because 320043481 - 2¹¹ = 320041433 is a prime.

It is a super-2 number, since 2×320043481² = 204855659461194722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (320043431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160021740 + 160021741.

It is an arithmetic number, because the mean of its divisors is an integer number (160021741).

Almost surely, 2^320043481 is an apocalyptic number.

It is an amenable number.

320043481 is a deficient number, since it is larger than the sum of its proper divisors (1).

320043481 is an equidigital number, since it uses as much as digits as its factorization.

320043481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 320043481 is about 17889.7591096135. The cubic root of 320043481 is about 684.0213570444.

The spelling of 320043481 in words is "three hundred twenty million, forty-three thousand, four hundred eighty-one".