211235836816 has 15 divisors (see below), whose sum is σ = 409272995793. Its totient is φ = 105616999200.

The previous prime is 211235836787. The next prime is 211235836849. The reversal of 211235836816 is 618638532112.

The square root of 211235836816 is 459604.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1325251216 + 209910585600 = 36404^2 + 458160^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1780966 + ... + 1895866.

Almost surely, 2^211235836816 is an apocalyptic number.

211235836816 is the 459604-th square number.

It is an amenable number.

211235836816 is a deficient number, since it is larger than the sum of its proper divisors (198037158977).

211235836816 is an frugal number, since it uses more digits than its factorization.

211235836816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229810 (or 114903 counting only the distinct ones).

The product of its digits is 414720, while the sum is 46.

The spelling of 211235836816 in words is "two hundred eleven billion, two hundred thirty-five million, eight hundred thirty-six thousand, eight hundred sixteen".