2155216896 has 360 divisors, whose sum is σ = 7612632720. Its totient is φ = 594542592.

The previous prime is 2155216879. The next prime is 2155216897. The reversal of 2155216896 is 6986125512.

2155216896 is a `hidden beast` number, since 2 + 1 + 552 + 1 + 6 + 8 + 96 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155216897) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 74317810 + ... + 74317838.

It is an arithmetic number, because the mean of its divisors is an integer number (21146202).

Almost surely, 2^2155216896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2155216896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3806316360).

2155216896 is an abundant number, since it is smaller than the sum of its proper divisors (5457415824).

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

2155216896 is an frugal number, since it uses more digits than its factorization.

2155216896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82 (or 41 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 2155216896 is about 46424.3136298212. The cubic root of 2155216896 is about 1291.7059528215.

The spelling of 2155216896 in words is "two billion, one hundred fifty-five million, two hundred sixteen thousand, eight hundred ninety-six".