2156117216 has 24 divisors (see below), whose sum is σ = 4630752504. Its totient is φ = 980053120.

The previous prime is 2156117213. The next prime is 2156117233. The reversal of 2156117216 is 6127116512.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156117213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3062315 + ... + 3063018.

It is an arithmetic number, because the mean of its divisors is an integer number (192948021).

Almost surely, 2^2156117216 is an apocalyptic number.

It is an amenable number.

2156117216 is an abundant number, since it is smaller than the sum of its proper divisors (2474635288).

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

2156117216 is a wasteful number, since it uses less digits than its factorization.

2156117216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6125354 (or 6125346 counting only the distinct ones).

The product of its digits is 5040, while the sum is 32.

The square root of 2156117216 is about 46434.0092604548. The cubic root of 2156117216 is about 1291.8857934687.

The spelling of 2156117216 in words is "two billion, one hundred fifty-six million, one hundred seventeen thousand, two hundred sixteen".