211216070 has 32 divisors (see below), whose sum is σ = 410477760. Its totient is φ = 77788800.

The previous prime is 211216021. The next prime is 211216079. The reversal of 211216070 is 70612112.

It is a super-2 number, since 2×211216070² = 89224456452489800, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211216079) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55220 + ... + 58920.

It is an arithmetic number, because the mean of its divisors is an integer number (12827430).

Almost surely, 2^211216070 is an apocalyptic number.

211216070 is a deficient number, since it is larger than the sum of its proper divisors (199261690).

211216070 is a wasteful number, since it uses less digits than its factorization.

211216070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4160.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 211216070 is about 14533.2745793919. The cubic root of 211216070 is about 595.5373250316.

Adding to 211216070 its reverse (70612112), we get a palindrome (281828182).

The spelling of 211216070 in words is "two hundred eleven million, two hundred sixteen thousand, seventy".