211540655042 has 16 divisors (see below), whose sum is σ = 323632469952. Its totient is φ = 103667294640.

The previous prime is 211540655041. The next prime is 211540655057. The reversal of 211540655042 is 240556045112.

It is a junction number, because it is equal to n+sod(n) for n = 211540654993 and 211540655011.

It is not an unprimeable number, because it can be changed into a prime (211540655041) 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 7 ways as a sum of consecutive naturals, for example, 929384 + ... + 1134387.

It is an arithmetic number, because the mean of its divisors is an integer number (20227029372).

Almost surely, 2^211540655042 is an apocalyptic number.

211540655042 is a deficient number, since it is larger than the sum of its proper divisors (112091814910).

211540655042 is a wasteful number, since it uses less digits than its factorization.

211540655042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2064793.

The product of its (nonzero) digits is 48000, while the sum is 35.

The spelling of 211540655042 in words is "two hundred eleven billion, five hundred forty million, six hundred fifty-five thousand, forty-two".