4543552421 has 2 divisors, whose sum is σ = 4543552422. Its totient is φ = 4543552420.

The previous prime is 4543552399. The next prime is 4543552423. The reversal of 4543552421 is 1242553454.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3700288900 + 843263521 = 60830^2 + 29039^2 .

It is a cyclic number.

It is not a de Polignac number, because 4543552421 - 2⁶ = 4543552357 is a prime.

It is a super-2 number, since 2×4543552421² = 41287737204749922482, which contains 22 as substring.

Together with 4543552423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4543552423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2271776210 + 2271776211.

It is an arithmetic number, because the mean of its divisors is an integer number (2271776211).

Almost surely, 2^4543552421 is an apocalyptic number.

It is an amenable number.

4543552421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4543552421 is an equidigital number, since it uses as much as digits as its factorization.

4543552421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96000, while the sum is 35.

The square root of 4543552421 is about 67405.8782377324. The cubic root of 4543552421 is about 1656.2727158513.

The spelling of 4543552421 in words is "four billion, five hundred forty-three million, five hundred fifty-two thousand, four hundred twenty-one".