211673812 has 24 divisors (see below), whose sum is σ = 424859456. Its totient is φ = 90393408.

The previous prime is 211673809. The next prime is 211673831. The reversal of 211673812 is 218376112.

It is a super-2 number, since 2×211673812² = 89611605373222688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5433 + ... + 21280.

Almost surely, 2^211673812 is an apocalyptic number.

It is an amenable number.

211673812 is an abundant number, since it is smaller than the sum of its proper divisors (213185644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211673812 is a wasteful number, since it uses less digits than its factorization.

211673812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27007 (or 27005 counting only the distinct ones).

The product of its digits is 4032, while the sum is 31.

The square root of 211673812 is about 14549.0141246753. The cubic root of 211673812 is about 595.9672256500.

The spelling of 211673812 in words is "two hundred eleven million, six hundred seventy-three thousand, eight hundred twelve".