243426321603 has 8 divisors (see below), whose sum is σ = 360631587600. Its totient is φ = 162284214384.

The previous prime is 243426321571. The next prime is 243426321623. The reversal of 243426321603 is 306123624342.

243426321603 is a `hidden beast` number, since 2 + 4 + 3 + 4 + 2 + 632 + 16 + 0 + 3 = 666.

It is not a de Polignac number, because 243426321603 - 2⁵ = 243426321571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243426321623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4507894818 + ... + 4507894871.

It is an arithmetic number, because the mean of its divisors is an integer number (45078948450).

Almost surely, 2^243426321603 is an apocalyptic number.

243426321603 is a deficient number, since it is larger than the sum of its proper divisors (117205265997).

243426321603 is an equidigital number, since it uses as much as digits as its factorization.

243426321603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9015789698 (or 9015789692 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 36.

Adding to 243426321603 its reverse (306123624342), we get a palindrome (549549945945).

The spelling of 243426321603 in words is "two hundred forty-three billion, four hundred twenty-six million, three hundred twenty-one thousand, six hundred three".