211946128 has 20 divisors (see below), whose sum is σ = 410888880. Its totient is φ = 105910304.

The previous prime is 211946117. The next prime is 211946131. The reversal of 211946128 is 821649112.

It is a happy number.

It is a super-2 number, since 2×211946128² = 89842322348384768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211946093 and 211946102.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36651 + ... + 42037.

It is an arithmetic number, because the mean of its divisors is an integer number (20544444).

Almost surely, 2^211946128 is an apocalyptic number.

It is an amenable number.

211946128 is a deficient number, since it is larger than the sum of its proper divisors (198942752).

211946128 is a wasteful number, since it uses less digits than its factorization.

211946128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7854 (or 7848 counting only the distinct ones).

The product of its digits is 6912, while the sum is 34.

The square root of 211946128 is about 14558.3696889453. The cubic root of 211946128 is about 596.2226845308. Note that the first 3 decimals are identical.

The spelling of 211946128 in words is "two hundred eleven million, nine hundred forty-six thousand, one hundred twenty-eight".