2139856216 has 16 divisors (see below), whose sum is σ = 4034647800. Its totient is φ = 1063950144.

The previous prime is 2139856207. The next prime is 2139856217. The reversal of 2139856216 is 6126589312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139856217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 745725 + ... + 748588.

Almost surely, 2^2139856216 is an apocalyptic number.

It is an amenable number.

2139856216 is a deficient number, since it is larger than the sum of its proper divisors (1894791584).

2139856216 is a wasteful number, since it uses less digits than its factorization.

2139856216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1494498 (or 1494494 counting only the distinct ones).

The product of its digits is 155520, while the sum is 43.

The square root of 2139856216 is about 46258.5799176758. The cubic root of 2139856216 is about 1288.6298807573.

The spelling of 2139856216 in words is "two billion, one hundred thirty-nine million, eight hundred fifty-six thousand, two hundred sixteen".