2155522144 has 24 divisors (see below), whose sum is σ = 4261912200. Its totient is φ = 1073131776.

The previous prime is 2155522141. The next prime is 2155522153. The reversal of 2155522144 is 4412255512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155522141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137094 + ... + 152005.

It is an arithmetic number, because the mean of its divisors is an integer number (177579675).

Almost surely, 2^2155522144 is an apocalyptic number.

It is an amenable number.

2155522144 is a deficient number, since it is larger than the sum of its proper divisors (2106390056).

2155522144 is a wasteful number, since it uses less digits than its factorization.

2155522144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289342 (or 289334 counting only the distinct ones).

The product of its digits is 16000, while the sum is 31.

The square root of 2155522144 is about 46427.6011010692. The cubic root of 2155522144 is about 1291.7669323059.

Adding to 2155522144 its reverse (4412255512), we get a palindrome (6567777656).

The spelling of 2155522144 in words is "two billion, one hundred fifty-five million, five hundred twenty-two thousand, one hundred forty-four".