211271630 has 16 divisors (see below), whose sum is σ = 381517344. Its totient is φ = 84235680.

The previous prime is 211271623. The next prime is 211271633. The reversal of 211271630 is 36172112.

It is a junction number, because it is equal to n+sod(n) for n = 211271596 and 211271605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211271633) 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 7 ways as a sum of consecutive naturals, for example, 30857 + ... + 37076.

It is an arithmetic number, because the mean of its divisors is an integer number (23844834).

Almost surely, 2^211271630 is an apocalyptic number.

211271630 is a deficient number, since it is larger than the sum of its proper divisors (170245714).

211271630 is a wasteful number, since it uses less digits than its factorization.

211271630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68251.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 211271630 is about 14535.1859293234. The cubic root of 211271630 is about 595.5895387874.

The spelling of 211271630 in words is "two hundred eleven million, two hundred seventy-one thousand, six hundred thirty".