211875228 has 36 divisors (see below), whose sum is σ = 538131048. Its totient is φ = 70287840.

The previous prime is 211875221. The next prime is 211875263. The reversal of 211875228 is 822578112.

211875228 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 (36).

It is a super-2 number, since 2×211875228² = 89782224480103968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 211875192 and 211875201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211875221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6351 + ... + 21542.

Almost surely, 2^211875228 is an apocalyptic number.

It is an amenable number.

211875228 is an abundant number, since it is smaller than the sum of its proper divisors (326255820).

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

211875228 is a wasteful number, since it uses less digits than its factorization.

211875228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28114 (or 28109 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 211875228 is about 14555.9344598689. The cubic root of 211875228 is about 596.1561945172.

The spelling of 211875228 in words is "two hundred eleven million, eight hundred seventy-five thousand, two hundred twenty-eight".