211616889 has 64 divisors (see below), whose sum is σ = 340623360. Its totient is φ = 115456320.

The previous prime is 211616879. The next prime is 211616903. The reversal of 211616889 is 988616112.

It is a de Polignac number, because none of the positive numbers 2^k-211616889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211616889.

It is not an unprimeable number, because it can be changed into a prime (211616879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1267084 + ... + 1267250.

It is an arithmetic number, because the mean of its divisors is an integer number (5322240).

Almost surely, 2^211616889 is an apocalyptic number.

It is an amenable number.

211616889 is a deficient number, since it is larger than the sum of its proper divisors (129006471).

211616889 is a wasteful number, since it uses less digits than its factorization.

211616889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290.

The product of its digits is 41472, while the sum is 42.

The square root of 211616889 is about 14547.0577437501. The cubic root of 211616889 is about 595.9137986602.

The spelling of 211616889 in words is "two hundred eleven million, six hundred sixteen thousand, eight hundred eighty-nine".