320501431 has 2 divisors, whose sum is σ = 320501432. Its totient is φ = 320501430.

The previous prime is 320501411. The next prime is 320501471. The reversal of 320501431 is 134105023.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 320501431 - 2¹¹ = 320499383 is a prime.

It is a super-2 number, since 2×320501431² = 205442334546095522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 320501399 and 320501408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320501411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160250715 + 160250716.

It is an arithmetic number, because the mean of its divisors is an integer number (160250716).

Almost surely, 2^320501431 is an apocalyptic number.

320501431 is a deficient number, since it is larger than the sum of its proper divisors (1).

320501431 is an equidigital number, since it uses as much as digits as its factorization.

320501431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 320501431 is about 17902.5537563779. The cubic root of 320501431 is about 684.3474567872.

Adding to 320501431 its reverse (134105023), we get a palindrome (454606454).

The spelling of 320501431 in words is "three hundred twenty million, five hundred one thousand, four hundred thirty-one".