320561002031 has 2 divisors, whose sum is σ = 320561002032. Its totient is φ = 320561002030.

The previous prime is 320561001991. The next prime is 320561002081. The reversal of 320561002031 is 130200165023.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 320561002031 - 2⁶ = 320561001967 is a prime.

It is a super-2 number, since 2×320561002031² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 320561001988 and 320561002006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320561002081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160280501015 + 160280501016.

It is an arithmetic number, because the mean of its divisors is an integer number (160280501016).

Almost surely, 2^320561002031 is an apocalyptic number.

320561002031 is a deficient number, since it is larger than the sum of its proper divisors (1).

320561002031 is an equidigital number, since it uses as much as digits as its factorization.

320561002031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 23.

Adding to 320561002031 its reverse (130200165023), we get a palindrome (450761167054).

The spelling of 320561002031 in words is "three hundred twenty billion, five hundred sixty-one million, two thousand, thirty-one".