4315020421 has 2 divisors, whose sum is σ = 4315020422. Its totient is φ = 4315020420.

The previous prime is 4315020419. The next prime is 4315020431. The reversal of 4315020421 is 1240205134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3563493025 + 751527396 = 59695^2 + 27414^2 .

It is a cyclic number.

It is not a de Polignac number, because 4315020421 - 2¹ = 4315020419 is a prime.

Together with 4315020419, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 4315020392 and 4315020401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4315020431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2157510210 + 2157510211.

It is an arithmetic number, because the mean of its divisors is an integer number (2157510211).

Almost surely, 2^4315020421 is an apocalyptic number.

It is an amenable number.

4315020421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4315020421 is an equidigital number, since it uses as much as digits as its factorization.

4315020421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 4315020421 is about 65688.8150372649. The cubic root of 4315020421 is about 1628.0245582092.

Adding to 4315020421 its reverse (1240205134), we get a palindrome (5555225555).

The spelling of 4315020421 in words is "four billion, three hundred fifteen million, twenty thousand, four hundred twenty-one".