211000004 has 6 divisors (see below), whose sum is σ = 369250014. Its totient is φ = 105500000.

The previous prime is 210999983. The next prime is 211000007. The reversal of 211000004 is 400000112.

It can be written as a sum of positive squares in only one way, i.e., 107163904 + 103836100 = 10352^2 + 10190^2 .

It is a junction number, because it is equal to n+sod(n) for n = 210999955 and 211000000.

It is not an unprimeable number, because it can be changed into a prime (211000007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26374997 + ... + 26375004.

It is an arithmetic number, because the mean of its divisors is an integer number (61541669).

Almost surely, 2^211000004 is an apocalyptic number.

It is an amenable number.

211000004 is a deficient number, since it is larger than the sum of its proper divisors (158250010).

211000004 is a wasteful number, since it uses less digits than its factorization.

211000004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52750005 (or 52750003 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 211000004 is about 14525.8391840196. The cubic root of 211000004 is about 595.3341850759.

Adding to 211000004 its reverse (400000112), we get a palindrome (611000116).

The spelling of 211000004 in words is "two hundred eleven million, four", and thus it is an aban number.