211384489 has 4 divisors (see below), whose sum is σ = 211633156. Its totient is φ = 211135824.

The previous prime is 211384471. The next prime is 211384499. The reversal of 211384489 is 984483112.

211384489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9517225 + 201867264 = 3085^2 + 14208^2 .

It is a cyclic number.

It is not a de Polignac number, because 211384489 - 2⁵ = 211384457 is a prime.

It is a super-2 number, since 2×211384489² = 89366804379582242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211384429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123054 + ... + 124759.

It is an arithmetic number, because the mean of its divisors is an integer number (52908289).

Almost surely, 2^211384489 is an apocalyptic number.

It is an amenable number.

211384489 is a deficient number, since it is larger than the sum of its proper divisors (248667).

211384489 is an equidigital number, since it uses as much as digits as its factorization.

211384489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248666.

The product of its digits is 55296, while the sum is 40.

The square root of 211384489 is about 14539.0676798755. The cubic root of 211384489 is about 595.6955723871.

The spelling of 211384489 in words is "two hundred eleven million, three hundred eighty-four thousand, four hundred eighty-nine".