211447812 has 24 divisors (see below), whose sum is σ = 499324896. Its totient is φ = 69633088.

The previous prime is 211447811. The next prime is 211447823. The reversal of 211447812 is 218744112.

It is a self number, because there is not a number n which added to its sum of digits gives 211447812.

It is not an unprimeable number, because it can be changed into a prime (211447811) 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, 105153 + ... + 107144.

It is an arithmetic number, because the mean of its divisors is an integer number (20805204).

Almost surely, 2^211447812 is an apocalyptic number.

It is an amenable number.

211447812 is an abundant number, since it is smaller than the sum of its proper divisors (287877084).

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

211447812 is a wasteful number, since it uses less digits than its factorization.

211447812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212387 (or 212385 counting only the distinct ones).

The product of its digits is 3584, while the sum is 30.

The square root of 211447812 is about 14541.2452011511. The cubic root of 211447812 is about 595.7550492594.

The spelling of 211447812 in words is "two hundred eleven million, four hundred forty-seven thousand, eight hundred twelve".