243203403451 has 8 divisors (see below), whose sum is σ = 256008181520. Its totient is φ = 230399085312.

The previous prime is 243203403439. The next prime is 243203403461. The reversal of 243203403451 is 154304302342.

It is a happy number.

243203403451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243203403451 - 2¹⁷ = 243203272379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243203403461) 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 in 7 ways as a sum of consecutive naturals, for example, 1728031 + ... + 1863463.

It is an arithmetic number, because the mean of its divisors is an integer number (32001022690).

Almost surely, 2^243203403451 is an apocalyptic number.

243203403451 is a deficient number, since it is larger than the sum of its proper divisors (12804778069).

243203403451 is a wasteful number, since it uses less digits than its factorization.

243203403451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229965.

The product of its (nonzero) digits is 34560, while the sum is 31.

Adding to 243203403451 its reverse (154304302342), we get a palindrome (397507705793).

The spelling of 243203403451 in words is "two hundred forty-three billion, two hundred three million, four hundred three thousand, four hundred fifty-one".