2155867206 has 32 divisors (see below), whose sum is σ = 4575242880. Its totient is φ = 674887296.

The previous prime is 2155867201. The next prime is 2155867213. The reversal of 2155867206 is 6027685512.

2155867206 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×2155867206³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155867201) 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, 25005 + ... + 70263.

It is an arithmetic number, because the mean of its divisors is an integer number (142976340).

Almost surely, 2^2155867206 is an apocalyptic number.

2155867206 is an abundant number, since it is smaller than the sum of its proper divisors (2419375674).

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

2155867206 is a wasteful number, since it uses less digits than its factorization.

2155867206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45748.

The product of its (nonzero) digits is 201600, while the sum is 42.

The square root of 2155867206 is about 46431.3170823314. The cubic root of 2155867206 is about 1291.8358585132.

The spelling of 2155867206 in words is "two billion, one hundred fifty-five million, eight hundred sixty-seven thousand, two hundred six".