211431204027 has 24 divisors (see below), whose sum is σ = 308354168304. Its totient is φ = 139591813824.

The previous prime is 211431204007. The next prime is 211431204097. The reversal of 211431204027 is 720402134112.

211431204027 is a `hidden beast` number, since 2 + 1 + 1 + 431 + 204 + 0 + 27 = 666.

It is not a de Polignac number, because 211431204027 - 2⁷ = 211431203899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211431204007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3098893 + ... + 3166385.

It is an arithmetic number, because the mean of its divisors is an integer number (12848090346).

Almost surely, 2^211431204027 is an apocalyptic number.

211431204027 is a deficient number, since it is larger than the sum of its proper divisors (96922964277).

211431204027 is a wasteful number, since it uses less digits than its factorization.

211431204027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70859 (or 70856 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

Adding to 211431204027 its reverse (720402134112), we get a palindrome (931833338139).

The spelling of 211431204027 in words is "two hundred eleven billion, four hundred thirty-one million, two hundred four thousand, twenty-seven".