211210056 has 48 divisors (see below), whose sum is σ = 572732160. Its totient is φ = 70316640.

The previous prime is 211210009. The next prime is 211210067. The reversal of 211210056 is 650012112.

211210056 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 87441 + ... + 89823.

It is an arithmetic number, because the mean of its divisors is an integer number (11931920).

Almost surely, 2^211210056 is an apocalyptic number.

It is an amenable number.

211210056 is an abundant number, since it is smaller than the sum of its proper divisors (361522104).

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

211210056 is a wasteful number, since it uses less digits than its factorization.

211210056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3626 (or 3619 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 211210056 is about 14533.0676734129. The cubic root of 211210056 is about 595.5316726910.

Adding to 211210056 its reverse (650012112), we get a palindrome (861222168).

The spelling of 211210056 in words is "two hundred eleven million, two hundred ten thousand, fifty-six".