320425871 has 2 divisors, whose sum is σ = 320425872. Its totient is φ = 320425870.

The previous prime is 320425829. The next prime is 320425879. The reversal of 320425871 is 178524023.

It is a strong prime.

It is an emirp because it is prime and its reverse (178524023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320425871 - 2²⁶ = 253317007 is a prime.

It is a super-2 number, since 2×320425871² = 205345477612217282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320425879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160212935 + 160212936.

It is an arithmetic number, because the mean of its divisors is an integer number (160212936).

Almost surely, 2^320425871 is an apocalyptic number.

320425871 is a deficient number, since it is larger than the sum of its proper divisors (1).

320425871 is an equidigital number, since it uses as much as digits as its factorization.

320425871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 320425871 is about 17900.4433185326. The cubic root of 320425871 is about 684.2936729837.

Adding to 320425871 its reverse (178524023), we get a palindrome (498949894).

The spelling of 320425871 in words is "three hundred twenty million, four hundred twenty-five thousand, eight hundred seventy-one".