4227546821 has 2 divisors, whose sum is σ = 4227546822. Its totient is φ = 4227546820.

The previous prime is 4227546803. The next prime is 4227546839. The reversal of 4227546821 is 1286457224.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (4227546803) and next prime (4227546839).

It can be written as a sum of positive squares in only one way, i.e., 3491509921 + 736036900 = 59089^2 + 27130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4227546821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4227546221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2113773410 + 2113773411.

It is an arithmetic number, because the mean of its divisors is an integer number (2113773411).

Almost surely, 2^4227546821 is an apocalyptic number.

It is an amenable number.

4227546821 is a deficient number, since it is larger than the sum of its proper divisors (1).

4227546821 is an equidigital number, since it uses as much as digits as its factorization.

4227546821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 215040, while the sum is 41.

The square root of 4227546821 is about 65019.5879793159. The cubic root of 4227546821 is about 1616.9483297439.

The spelling of 4227546821 in words is "four billion, two hundred twenty-seven million, five hundred forty-six thousand, eight hundred twenty-one".