320000251 has 2 divisors, whose sum is σ = 320000252. Its totient is φ = 320000250.

The previous prime is 320000227. The next prime is 320000267. The reversal of 320000251 is 152000023.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 320000251 - 2¹⁹ = 319475963 is a prime.

It is not a weakly prime, because it can be changed into another prime (320000201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160000125 + 160000126.

It is an arithmetic number, because the mean of its divisors is an integer number (160000126).

Almost surely, 2^320000251 is an apocalyptic number.

320000251 is a deficient number, since it is larger than the sum of its proper divisors (1).

320000251 is an equidigital number, since it uses as much as digits as its factorization.

320000251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 320000251 is about 17888.5508356602. The cubic root of 320000251 is about 683.9905575056.

Adding to 320000251 its reverse (152000023), we get a palindrome (472000274).

The spelling of 320000251 in words is "three hundred twenty million, two hundred fifty-one", and thus it is an aban number.