2243521979 has 2 divisors, whose sum is σ = 2243521980. Its totient is φ = 2243521978.

The previous prime is 2243521963. The next prime is 2243522063. The reversal of 2243521979 is 9791253422.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2243521979 - 2⁴ = 2243521963 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2243524979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1121760989 + 1121760990.

It is an arithmetic number, because the mean of its divisors is an integer number (1121760990).

Almost surely, 2^2243521979 is an apocalyptic number.

2243521979 is a deficient number, since it is larger than the sum of its proper divisors (1).

2243521979 is an equidigital number, since it uses as much as digits as its factorization.

2243521979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 44.

The square root of 2243521979 is about 47365.8313449685. The cubic root of 2243521979 is about 1309.1119165822. Note that the first 3 decimals are identical.

The spelling of 2243521979 in words is "two billion, two hundred forty-three million, five hundred twenty-one thousand, nine hundred seventy-nine".