2155019164 has 12 divisors (see below), whose sum is σ = 3774667624. Its totient is φ = 1076542704.

The previous prime is 2155019143. The next prime is 2155019177. The reversal of 2155019164 is 4619105512.

It is a happy number.

2155019164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 236694 + ... + 245629.

Almost surely, 2^2155019164 is an apocalyptic number.

It is an amenable number.

2155019164 is a deficient number, since it is larger than the sum of its proper divisors (1619648460).

2155019164 is a wasteful number, since it uses less digits than its factorization.

2155019164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483444 (or 483442 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 2155019164 is about 46422.1839641351. The cubic root of 2155019164 is about 1291.6664487677. Note that the first 3 decimals are identical.

The spelling of 2155019164 in words is "two billion, one hundred fifty-five million, nineteen thousand, one hundred sixty-four".