211719930 has 16 divisors (see below), whose sum is σ = 508127904. Its totient is φ = 56458640.

The previous prime is 211719919. The next prime is 211719953. The reversal of 211719930 is 39917112.

It is a junction number, because it is equal to n+sod(n) for n = 211719891 and 211719900.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3528636 + ... + 3528695.

It is an arithmetic number, because the mean of its divisors is an integer number (31757994).

Almost surely, 2^211719930 is an apocalyptic number.

211719930 is an abundant number, since it is smaller than the sum of its proper divisors (296407974).

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

211719930 is a wasteful number, since it uses less digits than its factorization.

211719930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7057341.

The product of its (nonzero) digits is 3402, while the sum is 33.

The square root of 211719930 is about 14550.5989567440. The cubic root of 211719930 is about 596.0105042216.

The spelling of 211719930 in words is "two hundred eleven million, seven hundred nineteen thousand, nine hundred thirty".