211156707055 has 16 divisors (see below), whose sum is σ = 289962953280. Its totient is φ = 144604864512.

The previous prime is 211156707053. The next prime is 211156707061. The reversal of 211156707055 is 550707651112.

It is a cyclic number.

It is not a de Polignac number, because 211156707055 - 2¹ = 211156707053 is a prime.

It is a super-2 number, since 2×211156707055² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211156706999 and 211156707017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211156707053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3895744 + ... + 3949573.

It is an arithmetic number, because the mean of its divisors is an integer number (18122684580).

Almost surely, 2^211156707055 is an apocalyptic number.

211156707055 is a deficient number, since it is larger than the sum of its proper divisors (78806246225).

211156707055 is an equidigital number, since it uses as much as digits as its factorization.

211156707055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7846098.

The product of its (nonzero) digits is 73500, while the sum is 40.

The spelling of 211156707055 in words is "two hundred eleven billion, one hundred fifty-six million, seven hundred seven thousand, fifty-five".