211544968 has 8 divisors (see below), whose sum is σ = 396646830. Its totient is φ = 105772480.

The previous prime is 211544959. The next prime is 211544969. The reversal of 211544968 is 869445112.

It can be written as a sum of positive squares in only one way, i.e., 188293284 + 23251684 = 13722^2 + 4822^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×211544968² = 89502546972242048, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211544968.

It is not an unprimeable number, because it can be changed into a prime (211544969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13221553 + ... + 13221568.

Almost surely, 2^211544968 is an apocalyptic number.

It is an amenable number.

211544968 is a deficient number, since it is larger than the sum of its proper divisors (185101862).

211544968 is a wasteful number, since it uses less digits than its factorization.

211544968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26443127 (or 26443123 counting only the distinct ones).

The product of its digits is 69120, while the sum is 40.

The square root of 211544968 is about 14544.5855217672. The cubic root of 211544968 is about 595.8462810929.

The spelling of 211544968 in words is "two hundred eleven million, five hundred forty-four thousand, nine hundred sixty-eight".