2782221601 has 2 divisors, whose sum is σ = 2782221602. Its totient is φ = 2782221600.

The previous prime is 2782221571. The next prime is 2782221643. The reversal of 2782221601 is 1061222872.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2570490000 + 211731601 = 50700^2 + 14551^2 .

It is a cyclic number.

It is not a de Polignac number, because 2782221601 - 2⁹ = 2782221089 is a prime.

It is not a weakly prime, because it can be changed into another prime (2782221671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1391110800 + 1391110801.

It is an arithmetic number, because the mean of its divisors is an integer number (1391110801).

Almost surely, 2^2782221601 is an apocalyptic number.

It is an amenable number.

2782221601 is a deficient number, since it is larger than the sum of its proper divisors (1).

2782221601 is an equidigital number, since it uses as much as digits as its factorization.

2782221601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 2782221601 is about 52746.7686308839. The cubic root of 2782221601 is about 1406.4703225862.

The spelling of 2782221601 in words is "two billion, seven hundred eighty-two million, two hundred twenty-one thousand, six hundred one".