5424043621 has 2 divisors, whose sum is σ = 5424043622. Its totient is φ = 5424043620.

The previous prime is 5424043561. The next prime is 5424043663. The reversal of 5424043621 is 1263404245.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4958131396 + 465912225 = 70414^2 + 21585^2 .

It is a cyclic number.

It is not a de Polignac number, because 5424043621 - 2¹³ = 5424035429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5424043321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2712021810 + 2712021811.

It is an arithmetic number, because the mean of its divisors is an integer number (2712021811).

Almost surely, 2^5424043621 is an apocalyptic number.

It is an amenable number.

5424043621 is a deficient number, since it is larger than the sum of its proper divisors (1).

5424043621 is an equidigital number, since it uses as much as digits as its factorization.

5424043621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 5424043621 is about 73648.1067034313. The cubic root of 5424043621 is about 1757.0106387906.

Adding to 5424043621 its reverse (1263404245), we get a palindrome (6687447866).

The spelling of 5424043621 in words is "five billion, four hundred twenty-four million, forty-three thousand, six hundred twenty-one".