2181206017 has 8 divisors (see below), whose sum is σ = 2191020480. Its totient is φ = 2171403600.

The previous prime is 2181206011. The next prime is 2181206047. The reversal of 2181206017 is 7106021812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2181206017 - 2¹⁵ = 2181173249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2181206011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 748359 + ... + 751267.

It is an arithmetic number, because the mean of its divisors is an integer number (273877560).

Almost surely, 2^2181206017 is an apocalyptic number.

It is an amenable number.

2181206017 is a deficient number, since it is larger than the sum of its proper divisors (9814463).

2181206017 is a wasteful number, since it uses less digits than its factorization.

2181206017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6023.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 2181206017 is about 46703.3833570974. The cubic root of 2181206017 is about 1296.8773211180.

Adding to 2181206017 its reverse (7106021812), we get a palindrome (9287227829).

The spelling of 2181206017 in words is "two billion, one hundred eighty-one million, two hundred six thousand, seventeen".