2155115512 has 48 divisors (see below), whose sum is σ = 4594804200. Its totient is φ = 945806400.

The previous prime is 2155115503. The next prime is 2155115537.

2155115512 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10314 + ... + 66457.

Almost surely, 2^2155115512 is an apocalyptic number.

2155115512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2155115512 is an abundant number, since it is smaller than the sum of its proper divisors (2439688688).

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

2155115512 is a wasteful number, since it uses less digits than its factorization.

2155115512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76828 (or 76813 counting only the distinct ones).

The product of its digits is 2500, while the sum is 28.

The square root of 2155115512 is about 46423.2216891504. The cubic root of 2155115512 is about 1291.6856980357.

The spelling of 2155115512 in words is "two billion, one hundred fifty-five million, one hundred fifteen thousand, five hundred twelve".