211051806089 has 4 divisors (see below), whose sum is σ = 211053087300. Its totient is φ = 211050524880.

The previous prime is 211051806061. The next prime is 211051806103. The reversal of 211051806089 is 980608150112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5110105225 + 205941700864 = 71485^2 + 453808^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211051806089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211051806019) 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, 349382 + ... + 737679.

It is an arithmetic number, because the mean of its divisors is an integer number (52763271825).

Almost surely, 2^211051806089 is an apocalyptic number.

It is an amenable number.

211051806089 is a deficient number, since it is larger than the sum of its proper divisors (1281211).

211051806089 is a wasteful number, since it uses less digits than its factorization.

211051806089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281210.

The product of its (nonzero) digits is 34560, while the sum is 41.

The spelling of 211051806089 in words is "two hundred eleven billion, fifty-one million, eight hundred six thousand, eighty-nine".