211542103550 has 48 divisors (see below), whose sum is σ = 427873395600. Its totient is φ = 77486952960.

The previous prime is 211542103547. The next prime is 211542103603. The reversal of 211542103550 is 55301245112.

211542103550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3331700 + ... + 3394599.

It is an arithmetic number, because the mean of its divisors is an integer number (8914029075).

Almost surely, 2^211542103550 is an apocalyptic number.

211542103550 is an abundant number, since it is smaller than the sum of its proper divisors (216331292050).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211542103550 is a wasteful number, since it uses less digits than its factorization.

211542103550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6726365 (or 6726360 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 29.

Adding to 211542103550 its reverse (55301245112), we get a palindrome (266843348662).

The spelling of 211542103550 in words is "two hundred eleven billion, five hundred forty-two million, one hundred three thousand, five hundred fifty".