211223808 has 72 divisors (see below), whose sum is σ = 624646400. Its totient is φ = 70405632.

The previous prime is 211223777. The next prime is 211223813. The reversal of 211223808 is 808322112.

It is a tau number, because it is divible by the number of its divisors (72).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 8368 + ... + 22191.

Almost surely, 2^211223808 is an apocalyptic number.

It is an amenable number.

211223808 is an abundant number, since it is smaller than the sum of its proper divisors (413422592).

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

211223808 is an equidigital number, since it uses as much as digits as its factorization.

211223808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30584 (or 30564 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 211223808 is about 14533.5407936263. The cubic root of 211223808 is about 595.5445975394.

The spelling of 211223808 in words is "two hundred eleven million, two hundred twenty-three thousand, eight hundred eight".