6424454221 has 2 divisors, whose sum is σ = 6424454222. Its totient is φ = 6424454220.

The previous prime is 6424454209. The next prime is 6424454293. The reversal of 6424454221 is 1224544246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5485031721 + 939422500 = 74061^2 + 30650^2 .

It is a cyclic number.

It is not a de Polignac number, because 6424454221 - 2¹¹ = 6424452173 is a prime.

It is a super-2 number, since 2×6424454221² = 82547224075449433682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6424454321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3212227110 + 3212227111.

It is an arithmetic number, because the mean of its divisors is an integer number (3212227111).

Almost surely, 2^6424454221 is an apocalyptic number.

It is an amenable number.

6424454221 is a deficient number, since it is larger than the sum of its proper divisors (1).

6424454221 is an equidigital number, since it uses as much as digits as its factorization.

6424454221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61440, while the sum is 34.

The square root of 6424454221 is about 80152.6931612407. The cubic root of 6424454221 is about 1858.9972454643.

Adding to 6424454221 its reverse (1224544246), we get a palindrome (7648998467).

The spelling of 6424454221 in words is "six billion, four hundred twenty-four million, four hundred fifty-four thousand, two hundred twenty-one".