243045521003 has 2 divisors, whose sum is σ = 243045521004. Its totient is φ = 243045521002.

The previous prime is 243045520981. The next prime is 243045521083. The reversal of 243045521003 is 300125540342.

It is a happy number.

243045521003 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 is a cyclic number.

It is not a de Polignac number, because 243045521003 - 2¹⁶ = 243045455467 is a prime.

It is a super-2 number, since 2×243045521003² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243045521083) 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, 121522760501 + 121522760502.

It is an arithmetic number, because the mean of its divisors is an integer number (121522760502).

Almost surely, 2^243045521003 is an apocalyptic number.

243045521003 is a deficient number, since it is larger than the sum of its proper divisors (1).

243045521003 is an equidigital number, since it uses as much as digits as its factorization.

243045521003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 29.

The spelling of 243045521003 in words is "two hundred forty-three billion, forty-five million, five hundred twenty-one thousand, three".