243203354551 has 8 divisors (see below), whose sum is σ = 245631145760. Its totient is φ = 240776844192.

The previous prime is 243203354549. The next prime is 243203354557. The reversal of 243203354551 is 155453302342.

243203354551 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 243203354551 - 2¹ = 243203354549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243203354551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243203354557) 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, 63721 + ... + 700333.

It is an arithmetic number, because the mean of its divisors is an integer number (30703893220).

Almost surely, 2^243203354551 is an apocalyptic number.

243203354551 is a deficient number, since it is larger than the sum of its proper divisors (2427791209).

243203354551 is a wasteful number, since it uses less digits than its factorization.

243203354551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640425.

The product of its (nonzero) digits is 216000, while the sum is 37.

Adding to 243203354551 its reverse (155453302342), we get a palindrome (398656656893).

The spelling of 243203354551 in words is "two hundred forty-three billion, two hundred three million, three hundred fifty-four thousand, five hundred fifty-one".