211939385 has 16 divisors (see below), whose sum is σ = 290967552. Its totient is φ = 145176000.

The previous prime is 211939369. The next prime is 211939397. The reversal of 211939385 is 583939112.

It is not a de Polignac number, because 211939385 - 2⁴ = 211939369 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 37655 + ... + 42915.

It is an arithmetic number, because the mean of its divisors is an integer number (18185472).

Almost surely, 2^211939385 is an apocalyptic number.

It is an amenable number.

211939385 is a deficient number, since it is larger than the sum of its proper divisors (79028167).

211939385 is a wasteful number, since it uses less digits than its factorization.

211939385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6424.

The product of its digits is 58320, while the sum is 41.

The square root of 211939385 is about 14558.1381021063. The cubic root of 211939385 is about 596.2163615841.

The spelling of 211939385 in words is "two hundred eleven million, nine hundred thirty-nine thousand, three hundred eighty-five".