211550545151 has 4 divisors (see below), whose sum is σ = 230782412904. Its totient is φ = 192318677400.

The previous prime is 211550545111. The next prime is 211550545169. The reversal of 211550545151 is 151545055112.

211550545151 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211550545151 is a prime.

It is a super-2 number, since 2×211550545151² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211550545111) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 9615933860 + ... + 9615933881.

It is an arithmetic number, because the mean of its divisors is an integer number (57695603226).

Almost surely, 2^211550545151 is an apocalyptic number.

211550545151 is a deficient number, since it is larger than the sum of its proper divisors (19231867753).

211550545151 is a wasteful number, since it uses less digits than its factorization.

211550545151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19231867752.

The product of its (nonzero) digits is 25000, while the sum is 35.

The spelling of 211550545151 in words is "two hundred eleven billion, five hundred fifty million, five hundred forty-five thousand, one hundred fifty-one".