4971282821 has 2 divisors, whose sum is σ = 4971282822. Its totient is φ = 4971282820.

The previous prime is 4971282803. The next prime is 4971282839. The reversal of 4971282821 is 1282821794.

It is a balanced prime because it is at equal distance from previous prime (4971282803) and next prime (4971282839).

It can be written as a sum of positive squares in only one way, i.e., 3982872100 + 988410721 = 63110^2 + 31439^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4971282821 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 (4971282221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2485641410 + 2485641411.

It is an arithmetic number, because the mean of its divisors is an integer number (2485641411).

Almost surely, 2^4971282821 is an apocalyptic number.

It is an amenable number.

4971282821 is a deficient number, since it is larger than the sum of its proper divisors (1).

4971282821 is an equidigital number, since it uses as much as digits as its factorization.

4971282821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 44.

The square root of 4971282821 is about 70507.3245911373. The cubic root of 4971282821 is about 1706.6959467930.

The spelling of 4971282821 in words is "four billion, nine hundred seventy-one million, two hundred eighty-two thousand, eight hundred twenty-one".