2185561106 has 16 divisors (see below), whose sum is σ = 3536682264. Its totient is φ = 1009092864.

The previous prime is 2185561099. The next prime is 2185561151. The reversal of 2185561106 is 6011655812.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2126039881 + 59521225 = 46109^2 + 7715^2 .

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, 604625 + ... + 608228.

Almost surely, 2^2185561106 is an apocalyptic number.

2185561106 is a deficient number, since it is larger than the sum of its proper divisors (1351121158).

2185561106 is a wasteful number, since it uses less digits than its factorization.

2185561106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212925.

The product of its (nonzero) digits is 14400, while the sum is 35.

The square root of 2185561106 is about 46749.9850909067. The cubic root of 2185561106 is about 1297.7398808292.

The spelling of 2185561106 in words is "two billion, one hundred eighty-five million, five hundred sixty-one thousand, one hundred six".