2155120016 has 40 divisors (see below), whose sum is σ = 4837440384. Its totient is φ = 910967040.

The previous prime is 2155120001. The next prime is 2155120027. The reversal of 2155120016 is 6100215512.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2155119973 and 2155120000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123620 + ... + 139971.

Almost surely, 2^2155120016 is an apocalyptic number.

It is an amenable number.

2155120016 is an abundant number, since it is smaller than the sum of its proper divisors (2682320368).

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

2155120016 is a wasteful number, since it uses less digits than its factorization.

2155120016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263679 (or 263673 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 2155120016 is about 46423.2701993300. The cubic root of 2155120016 is about 1291.6865978712.

Adding to 2155120016 its reverse (6100215512), we get a palindrome (8255335528).

The spelling of 2155120016 in words is "two billion, one hundred fifty-five million, one hundred twenty thousand, sixteen".