211805472 has 48 divisors (see below), whose sum is σ = 558169920. Its totient is φ = 70324992.

The previous prime is 211805471. The next prime is 211805507. The reversal of 211805472 is 274508112.

211805472 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (211805471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21054 + ... + 29442.

It is an arithmetic number, because the mean of its divisors is an integer number (11628540).

Almost surely, 2^211805472 is an apocalyptic number.

It is an amenable number.

211805472 is an abundant number, since it is smaller than the sum of its proper divisors (346364448).

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

211805472 is a wasteful number, since it uses less digits than its factorization.

211805472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8665 (or 8657 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 211805472 is about 14553.5381265176. The cubic root of 211805472 is about 596.0907628691.

The spelling of 211805472 in words is "two hundred eleven million, eight hundred five thousand, four hundred seventy-two".