481845821 has 2 divisors, whose sum is σ = 481845822. Its totient is φ = 481845820.

The previous prime is 481845799. The next prime is 481845827. The reversal of 481845821 is 128548184.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 466084921 + 15760900 = 21589^2 + 3970^2 .

It is a cyclic number.

It is not a de Polignac number, because 481845821 - 2¹⁴ = 481829437 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (481845827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 240922910 + 240922911.

It is an arithmetic number, because the mean of its divisors is an integer number (240922911).

Almost surely, 2^481845821 is an apocalyptic number.

It is an amenable number.

481845821 is a deficient number, since it is larger than the sum of its proper divisors (1).

481845821 is an equidigital number, since it uses as much as digits as its factorization.

481845821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81920, while the sum is 41.

The square root of 481845821 is about 21950.9867887528. The cubic root of 481845821 is about 783.9758757371.

The spelling of 481845821 in words is "four hundred eighty-one million, eight hundred forty-five thousand, eight hundred twenty-one".