2155566212 has 12 divisors (see below), whose sum is σ = 3773678160. Its totient is φ = 1077372456.

The previous prime is 2155566199. The next prime is 2155566247. The reversal of 2155566212 is 2126655512.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90698 + ... + 111969.

It is an arithmetic number, because the mean of its divisors is an integer number (314473180).

Almost surely, 2^2155566212 is an apocalyptic number.

It is an amenable number.

2155566212 is a deficient number, since it is larger than the sum of its proper divisors (1618111948).

2155566212 is a wasteful number, since it uses less digits than its factorization.

2155566212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205330 (or 205328 counting only the distinct ones).

The product of its digits is 36000, while the sum is 35.

The square root of 2155566212 is about 46428.0756870237. The cubic root of 2155566212 is about 1291.7757353079.

The spelling of 2155566212 in words is "two billion, one hundred fifty-five million, five hundred sixty-six thousand, two hundred twelve".