211261163 has 4 divisors (see below), whose sum is σ = 211927920. Its totient is φ = 210594408.

The previous prime is 211261079. The next prime is 211261189. The reversal of 211261163 is 361162112.

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

It is a cyclic number.

It is not a de Polignac number, because 211261163 - 2¹⁴ = 211244779 is a prime.

It is a super-2 number, since 2×211261163² = 89262557984225138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211267163) 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 3 ways as a sum of consecutive naturals, for example, 332903 + ... + 333536.

It is an arithmetic number, because the mean of its divisors is an integer number (52981980).

Almost surely, 2^211261163 is an apocalyptic number.

211261163 is a deficient number, since it is larger than the sum of its proper divisors (666757).

211261163 is an equidigital number, since it uses as much as digits as its factorization.

211261163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666756.

The product of its digits is 432, while the sum is 23.

The square root of 211261163 is about 14534.8258675500. The cubic root of 211261163 is about 595.5797028894.

The spelling of 211261163 in words is "two hundred eleven million, two hundred sixty-one thousand, one hundred sixty-three".