320550533 has 2 divisors, whose sum is σ = 320550534. Its totient is φ = 320550532.

The previous prime is 320550491. The next prime is 320550553. The reversal of 320550533 is 335055023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 320517409 + 33124 = 17903^2 + 182^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320550533 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320550553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160275266 + 160275267.

It is an arithmetic number, because the mean of its divisors is an integer number (160275267).

Almost surely, 2^320550533 is an apocalyptic number.

It is an amenable number.

320550533 is a deficient number, since it is larger than the sum of its proper divisors (1).

320550533 is an equidigital number, since it uses as much as digits as its factorization.

320550533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6750, while the sum is 26.

The square root of 320550533 is about 17903.9250724527. The cubic root of 320550533 is about 684.3824031865.

The spelling of 320550533 in words is "three hundred twenty million, five hundred fifty thousand, five hundred thirty-three".