2155120144 has 20 divisors (see below), whose sum is σ = 4395311440. Its totient is φ = 1020846240.

The previous prime is 2155120129. The next prime is 2155120151. The reversal of 2155120144 is 4410215512.

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, 3544302 + ... + 3544909.

It is an arithmetic number, because the mean of its divisors is an integer number (219765572).

Almost surely, 2^2155120144 is an apocalyptic number.

It is an amenable number.

2155120144 is an abundant number, since it is smaller than the sum of its proper divisors (2240191296).

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

2155120144 is a wasteful number, since it uses less digits than its factorization.

2155120144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7089238 (or 7089232 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 2155120144 is about 46423.2715779489. The cubic root of 2155120144 is about 1291.6866234438.

Adding to 2155120144 its reverse (4410215512), we get a palindrome (6565335656).

The spelling of 2155120144 in words is "two billion, one hundred fifty-five million, one hundred twenty thousand, one hundred forty-four".