2155188 has 24 divisors (see below), whose sum is σ = 5747392. Its totient is φ = 615744.

The previous prime is 2155187. The next prime is 2155201. The reversal of 2155188 is 8815512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12745 + ... + 12912.

2^2155188 is an apocalyptic number.

2155188 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2155188 is an abundant number, since it is smaller than the sum of its proper divisors (3592204).

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

2155188 is a wasteful number, since it uses less digits than its factorization.

2155188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25671 (or 25669 counting only the distinct ones).

The product of its digits is 3200, while the sum is 30.

The square root of 2155188 is about 1468.0558572479. The cubic root of 2155188 is about 129.1700179961.

The spelling of 2155188 in words is "two million, one hundred fifty-five thousand, one hundred eighty-eight".