2155392 has 48 divisors (see below), whose sum is σ = 6205680. Its totient is φ = 718080.

The previous prime is 2155381. The next prime is 2155393. The reversal of 2155392 is 2935512.

2155392 is a `hidden beast` number, since 21 + 553 + 92 = 666.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 217 + ... + 2087.

It is an arithmetic number, because the mean of its divisors is an integer number (129285).

2^2155392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2155392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3102840).

2155392 is an abundant number, since it is smaller than the sum of its proper divisors (4050288).

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

2155392 is a wasteful number, since it uses less digits than its factorization.

2155392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1891 (or 1876 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 2155392 is about 1468.1253352490. The cubic root of 2155392 is about 129.1740934104.

The spelling of 2155392 in words is "two million, one hundred fifty-five thousand, three hundred ninety-two".