211229788 has 36 divisors (see below), whose sum is σ = 469099512. Its totient is φ = 82296480.

The previous prime is 211229773. The next prime is 211229791. The reversal of 211229788 is 887922112.

211229788 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 211229788.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46831 + ... + 51142.

It is an arithmetic number, because the mean of its divisors is an integer number (13030542).

Almost surely, 2^211229788 is an apocalyptic number.

211229788 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

211229788 is an abundant number, since it is smaller than the sum of its proper divisors (257869724).

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

211229788 is a wasteful number, since it uses less digits than its factorization.

211229788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98002 (or 97993 counting only the distinct ones).

The product of its digits is 32256, while the sum is 40.

The square root of 211229788 is about 14533.7465231784. The cubic root of 211229788 is about 595.5502176809.

The spelling of 211229788 in words is "two hundred eleven million, two hundred twenty-nine thousand, seven hundred eighty-eight".