211891130 has 16 divisors (see below), whose sum is σ = 416077344. Its totient is φ = 77051280.

The previous prime is 211891123. The next prime is 211891153. The reversal of 211891130 is 31198112.

211891130 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 211891130.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 963032 + ... + 963251.

It is an arithmetic number, because the mean of its divisors is an integer number (26004834).

Almost surely, 2^211891130 is an apocalyptic number.

211891130 is a deficient number, since it is larger than the sum of its proper divisors (204186214).

211891130 is a wasteful number, since it uses less digits than its factorization.

211891130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1926301.

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 211891130 is about 14556.4806873090. The cubic root of 211891130 is about 596.1711087016.

The spelling of 211891130 in words is "two hundred eleven million, eight hundred ninety-one thousand, one hundred thirty".