2115543760 has 160 divisors (see below), whose sum is σ = 5556822912. Its totient is φ = 742410240.

The previous prime is 2115543701. The next prime is 2115543763. The reversal of 2115543760 is 673455112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2115543763) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3124542 + ... + 3125218.

Almost surely, 2^2115543760 is an apocalyptic number.

2115543760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2115543760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2778411456).

2115543760 is an abundant number, since it is smaller than the sum of its proper divisors (3441279152).

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

2115543760 is a wasteful number, since it uses less digits than its factorization.

2115543760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821 (or 815 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 2115543760 is about 45995.0406022215. The cubic root of 2115543760 is about 1283.7309277244.

Adding to 2115543760 its reverse (673455112), we get a palindrome (2788998872).

The spelling of 2115543760 in words is "two billion, one hundred fifteen million, five hundred forty-three thousand, seven hundred sixty".