2431220321 has 2 divisors, whose sum is σ = 2431220322. Its totient is φ = 2431220320.

The previous prime is 2431220317. The next prime is 2431220327. The reversal of 2431220321 is 1230221342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1758544225 + 672676096 = 41935^2 + 25936^2 .

It is a cyclic number.

It is not a de Polignac number, because 2431220321 - 2² = 2431220317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2431220293 and 2431220302.

It is not a weakly prime, because it can be changed into another prime (2431220327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1215610160 + 1215610161.

It is an arithmetic number, because the mean of its divisors is an integer number (1215610161).

Almost surely, 2^2431220321 is an apocalyptic number.

It is an amenable number.

2431220321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2431220321 is an equidigital number, since it uses as much as digits as its factorization.

2431220321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 2431220321 is about 49307.4063503649. The cubic root of 2431220321 is about 1344.6464378407.

Adding to 2431220321 its reverse (1230221342), we get a palindrome (3661441663).

The spelling of 2431220321 in words is "two billion, four hundred thirty-one million, two hundred twenty thousand, three hundred twenty-one".