211288252 has 54 divisors (see below), whose sum is σ = 439695816. Its totient is φ = 87024960.

The previous prime is 211288243. The next prime is 211288267. The reversal of 211288252 is 252882112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3153523 + ... + 3153589.

Almost surely, 2^211288252 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211288252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219847908).

211288252 is an abundant number, since it is smaller than the sum of its proper divisors (228407564).

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

211288252 is an equidigital number, since it uses as much as digits as its factorization.

211288252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227 (or 117 counting only the distinct ones).

The product of its digits is 5120, while the sum is 31.

The square root of 211288252 is about 14535.7577029889. The cubic root of 211288252 is about 595.6051579057.

The spelling of 211288252 in words is "two hundred eleven million, two hundred eighty-eight thousand, two hundred fifty-two".