2800223981 has 2 divisors, whose sum is σ = 2800223982. Its totient is φ = 2800223980.

The previous prime is 2800223953. The next prime is 2800224013. The reversal of 2800223981 is 1893220082.

2800223981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2024100100 + 776123881 = 44990^2 + 27859^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2800223981 is a prime.

It is a super-2 number, since 2×2800223981² = 15682508687534976722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2800223581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1400111990 + 1400111991.

It is an arithmetic number, because the mean of its divisors is an integer number (1400111991).

Almost surely, 2^2800223981 is an apocalyptic number.

It is an amenable number.

2800223981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2800223981 is an equidigital number, since it uses as much as digits as its factorization.

2800223981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 2800223981 is about 52917.1426004844. The cubic root of 2800223981 is about 1409.4973278161.

The spelling of 2800223981 in words is "two billion, eight hundred million, two hundred twenty-three thousand, nine hundred eighty-one".