243203355051 has 16 divisors (see below), whose sum is σ = 327708050208. Its totient is φ = 160418073600.

The previous prime is 243203355047. The next prime is 243203355061. The reversal of 243203355051 is 150553302342.

It is not a de Polignac number, because 243203355051 - 2² = 243203355047 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243203355061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 912421 + ... + 1148441.

It is an arithmetic number, because the mean of its divisors is an integer number (20481753138).

Almost surely, 2^243203355051 is an apocalyptic number.

243203355051 is a deficient number, since it is larger than the sum of its proper divisors (84504695157).

243203355051 is a wasteful number, since it uses less digits than its factorization.

243203355051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239662.

The product of its (nonzero) digits is 54000, while the sum is 33.

Adding to 243203355051 its reverse (150553302342), we get a palindrome (393756657393).

The spelling of 243203355051 in words is "two hundred forty-three billion, two hundred three million, three hundred fifty-five thousand, fifty-one".