4215130321 has 2 divisors, whose sum is σ = 4215130322. Its totient is φ = 4215130320.

The previous prime is 4215130319. The next prime is 4215130379. The reversal of 4215130321 is 1230315124.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4075417921 + 139712400 = 63839^2 + 11820^2 .

It is a cyclic number.

It is not a de Polignac number, because 4215130321 - 2¹ = 4215130319 is a prime.

Together with 4215130319, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 4215130292 and 4215130301.

It is not a weakly prime, because it can be changed into another prime (4215130721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2107565160 + 2107565161.

It is an arithmetic number, because the mean of its divisors is an integer number (2107565161).

Almost surely, 2^4215130321 is an apocalyptic number.

It is an amenable number.

4215130321 is a deficient number, since it is larger than the sum of its proper divisors (1).

4215130321 is an equidigital number, since it uses as much as digits as its factorization.

4215130321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 4215130321 is about 64924.0350024550. The cubic root of 4215130321 is about 1615.3637601376.

Adding to 4215130321 its reverse (1230315124), we get a palindrome (5445445445).

The spelling of 4215130321 in words is "four billion, two hundred fifteen million, one hundred thirty thousand, three hundred twenty-one".