4254633821 has 2 divisors, whose sum is σ = 4254633822. Its totient is φ = 4254633820.

The previous prime is 4254633769. The next prime is 4254633829. The reversal of 4254633821 is 1283364524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3263265625 + 991368196 = 57125^2 + 31486^2 .

It is a cyclic number.

It is not a de Polignac number, because 4254633821 - 2¹⁰ = 4254632797 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4254633829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2127316910 + 2127316911.

It is an arithmetic number, because the mean of its divisors is an integer number (2127316911).

Almost surely, 2^4254633821 is an apocalyptic number.

It is an amenable number.

4254633821 is a deficient number, since it is larger than the sum of its proper divisors (1).

4254633821 is an equidigital number, since it uses as much as digits as its factorization.

4254633821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 38.

The square root of 4254633821 is about 65227.5541546669. The cubic root of 4254633821 is about 1620.3943841157.

It can be divided in two parts, 42546 and 33821, that added together give a palindrome (76367).

The spelling of 4254633821 in words is "four billion, two hundred fifty-four million, six hundred thirty-three thousand, eight hundred twenty-one".