243521224049 has 2 divisors, whose sum is σ = 243521224050. Its totient is φ = 243521224048.

The previous prime is 243521224003. The next prime is 243521224073. The reversal of 243521224049 is 940422125342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177455775025 + 66065449024 = 421255^2 + 257032^2 .

It is a cyclic number.

It is not a de Polignac number, because 243521224049 - 2⁸ = 243521223793 is a prime.

It is not a weakly prime, because it can be changed into another prime (243521224549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121760612024 + 121760612025.

It is an arithmetic number, because the mean of its divisors is an integer number (121760612025).

Almost surely, 2^243521224049 is an apocalyptic number.

It is an amenable number.

243521224049 is a deficient number, since it is larger than the sum of its proper divisors (1).

243521224049 is an equidigital number, since it uses as much as digits as its factorization.

243521224049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 38.

The spelling of 243521224049 in words is "two hundred forty-three billion, five hundred twenty-one million, two hundred twenty-four thousand, forty-nine".