2273805602821 has 2 divisors, whose sum is σ = 2273805602822. Its totient is φ = 2273805602820.

The previous prime is 2273805602813. The next prime is 2273805602891. The reversal of 2273805602821 is 1282065083722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1577131593921 + 696674008900 = 1255839^2 + 834670^2 .

It is a cyclic number.

It is not a de Polignac number, because 2273805602821 - 2³ = 2273805602813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2273805602891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1136902801410 + 1136902801411.

It is an arithmetic number, because the mean of its divisors is an integer number (1136902801411).

Almost surely, 2^{2273805602821} is an apocalyptic number.

It is an amenable number.

2273805602821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2273805602821 is an equidigital number, since it uses as much as digits as its factorization.

2273805602821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 645120, while the sum is 46.

The spelling of 2273805602821 in words is "two trillion, two hundred seventy-three billion, eight hundred five million, six hundred two thousand, eight hundred twenty-one".