243105211255 has 32 divisors (see below), whose sum is σ = 301562740800. Its totient is φ = 187996649472.

The previous prime is 243105211253. The next prime is 243105211273. The reversal of 243105211255 is 552112501342.

It is a cyclic number.

It is not a de Polignac number, because 243105211255 - 2¹ = 243105211253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243105211253) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78698751 + ... + 78701839.

It is an arithmetic number, because the mean of its divisors is an integer number (9423835650).

Almost surely, 2^243105211255 is an apocalyptic number.

243105211255 is a deficient number, since it is larger than the sum of its proper divisors (58457529545).

243105211255 is a wasteful number, since it uses less digits than its factorization.

243105211255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5763.

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 243105211255 its reverse (552112501342), we get a palindrome (795217712597).

The spelling of 243105211255 in words is "two hundred forty-three billion, one hundred five million, two hundred eleven thousand, two hundred fifty-five".