243203254351 has 4 divisors (see below), whose sum is σ = 253777308912. Its totient is φ = 232629199792.

The previous prime is 243203254337. The next prime is 243203254367. The reversal of 243203254351 is 153452302342.

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 243203254351 - 2³⁷ = 105764300879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243203254321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5287027246 + ... + 5287027291.

It is an arithmetic number, because the mean of its divisors is an integer number (63444327228).

Almost surely, 2^243203254351 is an apocalyptic number.

243203254351 is a deficient number, since it is larger than the sum of its proper divisors (10574054561).

243203254351 is a wasteful number, since it uses less digits than its factorization.

243203254351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10574054560.

The product of its (nonzero) digits is 86400, while the sum is 34.

Adding to 243203254351 its reverse (153452302342), we get a palindrome (396655556693).

The spelling of 243203254351 in words is "two hundred forty-three billion, two hundred three million, two hundred fifty-four thousand, three hundred fifty-one".