211850870 has 32 divisors (see below), whose sum is σ = 475428096. Its totient is φ = 66031200.

The previous prime is 211850867. The next prime is 211850939. The reversal of 211850870 is 78058112.

It is a happy number.

It is a super-2 number, since 2×211850870² = 89761582239513800, which contains 22 as substring.

It is a congruent 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, 136796 + ... + 138335.

It is an arithmetic number, because the mean of its divisors is an integer number (14857128).

Almost surely, 2^211850870 is an apocalyptic number.

211850870 is an abundant number, since it is smaller than the sum of its proper divisors (263577226).

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

211850870 is a wasteful number, since it uses less digits than its factorization.

211850870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275156.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 211850870 is about 14555.0977324098. The cubic root of 211850870 is about 596.1333481636.

The spelling of 211850870 in words is "two hundred eleven million, eight hundred fifty thousand, eight hundred seventy".