243251205103 has 4 divisors (see below), whose sum is σ = 243534385480. Its totient is φ = 242968024728.

The previous prime is 243251205101. The next prime is 243251205107. The reversal of 243251205103 is 301502152342.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 243251205103 - 2¹ = 243251205101 is a prime.

It is a super-2 number, since 2×243251205103² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243251205101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141588900 + ... + 141590617.

It is an arithmetic number, because the mean of its divisors is an integer number (60883596370).

Almost surely, 2^243251205103 is an apocalyptic number.

243251205103 is a deficient number, since it is larger than the sum of its proper divisors (283180377).

243251205103 is an equidigital number, since it uses as much as digits as its factorization.

243251205103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283180376.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 243251205103 its reverse (301502152342), we get a palindrome (544753357445).

The spelling of 243251205103 in words is "two hundred forty-three billion, two hundred fifty-one million, two hundred five thousand, one hundred three".