855189211 has 4 divisors (see below), whose sum is σ = 855493912. Its totient is φ = 854884512.

The previous prime is 855189191. The next prime is 855189217. The reversal of 855189211 is 112981558.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 855189211 - 2⁹ = 855188699 is a prime.

It is a super-2 number, since 2×855189211² = 1462697173221605042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (855189217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148101 + ... + 153766.

It is an arithmetic number, because the mean of its divisors is an integer number (213873478).

Almost surely, 2^855189211 is an apocalyptic number.

855189211 is a deficient number, since it is larger than the sum of its proper divisors (304701).

855189211 is a wasteful number, since it uses less digits than its factorization.

855189211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304700.

The product of its digits is 28800, while the sum is 40.

The square root of 855189211 is about 29243.6182952794. The cubic root of 855189211 is about 949.1920040198.

The spelling of 855189211 in words is "eight hundred fifty-five million, one hundred eighty-nine thousand, two hundred eleven".