320513803 has 2 divisors, whose sum is σ = 320513804. Its totient is φ = 320513802.

The previous prime is 320513797. The next prime is 320513807. The reversal of 320513803 is 308315023.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 320513803 - 2¹³ = 320505611 is a prime.

It is not a weakly prime, because it can be changed into another prime (320513807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160256901 + 160256902.

It is an arithmetic number, because the mean of its divisors is an integer number (160256902).

Almost surely, 2^320513803 is an apocalyptic number.

320513803 is a deficient number, since it is larger than the sum of its proper divisors (1).

320513803 is an equidigital number, since it uses as much as digits as its factorization.

320513803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 320513803 is about 17902.8992903384. The cubic root of 320513803 is about 684.3562624034.

Adding to 320513803 its reverse (308315023), we get a palindrome (628828826).

The spelling of 320513803 in words is "three hundred twenty million, five hundred thirteen thousand, eight hundred three".