2155206612 has 48 divisors (see below), whose sum is σ = 5541609920. Its totient is φ = 647716608.

The previous prime is 2155206611. The next prime is 2155206617. The reversal of 2155206612 is 2166025512.

2155206612 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 2155206612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155206611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153937 + ... + 167352.

Almost surely, 2^2155206612 is an apocalyptic number.

It is an amenable number.

2155206612 is an abundant number, since it is smaller than the sum of its proper divisors (3386403308).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2155206612 is a wasteful number, since it uses less digits than its factorization.

2155206612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321352 (or 321350 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 2155206612 is about 46424.2028687623. The cubic root of 2155206612 is about 1291.7038982835.

The spelling of 2155206612 in words is "two billion, one hundred fifty-five million, two hundred six thousand, six hundred twelve".