211431242305 has 64 divisors (see below), whose sum is σ = 270772862976. Its totient is φ = 158233824000.

The previous prime is 211431242303. The next prime is 211431242311. The reversal of 211431242305 is 503242134112.

It is not a de Polignac number, because 211431242305 - 2¹ = 211431242303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211431242303) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 390815335 + ... + 390815875.

It is an arithmetic number, because the mean of its divisors is an integer number (4230825984).

Almost surely, 2^211431242305 is an apocalyptic number.

It is an amenable number.

211431242305 is a deficient number, since it is larger than the sum of its proper divisors (59341620671).

211431242305 is a wasteful number, since it uses less digits than its factorization.

211431242305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 211431242305 its reverse (503242134112), we get a palindrome (714673376417).

The spelling of 211431242305 in words is "two hundred eleven billion, four hundred thirty-one million, two hundred forty-two thousand, three hundred five".