2281220221849 has 2 divisors, whose sum is σ = 2281220221850. Its totient is φ = 2281220221848.

The previous prime is 2281220221807. The next prime is 2281220221853. The reversal of 2281220221849 is 9481220221822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1260578790025 + 1020641431824 = 1122755^2 + 1010268^2 .

It is a cyclic number.

It is not a de Polignac number, because 2281220221849 - 2¹⁵ = 2281220189081 is a prime.

It is not a weakly prime, because it can be changed into another prime (2281220221649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1140610110924 + 1140610110925.

It is an arithmetic number, because the mean of its divisors is an integer number (1140610110925).

Almost surely, 2^{2281220221849} is an apocalyptic number.

It is an amenable number.

2281220221849 is a deficient number, since it is larger than the sum of its proper divisors (1).

2281220221849 is an equidigital number, since it uses as much as digits as its factorization.

2281220221849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 147456, while the sum is 43.

The spelling of 2281220221849 in words is "two trillion, two hundred eighty-one billion, two hundred twenty million, two hundred twenty-one thousand, eight hundred forty-nine".