320000431 has 2 divisors, whose sum is σ = 320000432. Its totient is φ = 320000430.

The previous prime is 320000419. The next prime is 320000437. The reversal of 320000431 is 134000023.

It is a strong prime.

It is an emirp because it is prime and its reverse (134000023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320000431 - 2¹⁵ = 319967663 is a prime.

It is a super-2 number, since 2×320000431² = 204800551680371522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320000437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160000215 + 160000216.

It is an arithmetic number, because the mean of its divisors is an integer number (160000216).

Almost surely, 2^320000431 is an apocalyptic number.

320000431 is a deficient number, since it is larger than the sum of its proper divisors (1).

320000431 is an equidigital number, since it uses as much as digits as its factorization.

320000431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 320000431 is about 17888.5558668105. Note that the first 3 decimals coincide. The cubic root of 320000431 is about 683.9906857537.

Adding to 320000431 its reverse (134000023), we get a palindrome (454000454).

The spelling of 320000431 in words is "three hundred twenty million, four hundred thirty-one", and thus it is an aban number.