2115543012 has 24 divisors (see below), whose sum is σ = 5385018912. Its totient is φ = 641073600.

The previous prime is 2115543007. The next prime is 2115543047. The reversal of 2115543012 is 2103455112.

It is a happy number.

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, 8013289 + ... + 8013552.

It is an arithmetic number, because the mean of its divisors is an integer number (224375788).

Almost surely, 2^2115543012 is an apocalyptic number.

2115543012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2115543012 is an abundant number, since it is smaller than the sum of its proper divisors (3269475900).

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

2115543012 is a wasteful number, since it uses less digits than its factorization.

2115543012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16026859 (or 16026857 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 2115543012 is about 45995.0324709093. The cubic root of 2115543012 is about 1283.7307764267.

Adding to 2115543012 its reverse (2103455112), we get a palindrome (4218998124).

The spelling of 2115543012 in words is "two billion, one hundred fifteen million, five hundred forty-three thousand, twelve".