243044031073 has 2 divisors, whose sum is σ = 243044031074. Its totient is φ = 243044031072.

The previous prime is 243044031049. The next prime is 243044031079. The reversal of 243044031073 is 370130440342.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148384432849 + 94659598224 = 385207^2 + 307668^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243044031073 is a prime.

It is not a weakly prime, because it can be changed into another prime (243044031079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121522015536 + 121522015537.

It is an arithmetic number, because the mean of its divisors is an integer number (121522015537).

Almost surely, 2^243044031073 is an apocalyptic number.

It is an amenable number.

243044031073 is a deficient number, since it is larger than the sum of its proper divisors (1).

243044031073 is an equidigital number, since it uses as much as digits as its factorization.

243044031073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 31.

The spelling of 243044031073 in words is "two hundred forty-three billion, forty-four million, thirty-one thousand, seventy-three".