211317328 has 40 divisors (see below), whose sum is σ = 427472640. Its totient is φ = 101080320.

The previous prime is 211317277. The next prime is 211317331. The reversal of 211317328 is 823713112.

It is a super-2 number, since 2×211317328² = 89310026226119168, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211317296 and 211317305.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41751 + ... + 46537.

It is an arithmetic number, because the mean of its divisors is an integer number (10686816).

Almost surely, 2^211317328 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 211317328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213736320).

211317328 is an abundant number, since it is smaller than the sum of its proper divisors (216155312).

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

211317328 is a wasteful number, since it uses less digits than its factorization.

211317328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4915 (or 4909 counting only the distinct ones).

The product of its digits is 2016, while the sum is 28.

The square root of 211317328 is about 14536.7578228434. The cubic root of 211317328 is about 595.6324776471.

The spelling of 211317328 in words is "two hundred eleven million, three hundred seventeen thousand, three hundred twenty-eight".