2156216210 has 8 divisors (see below), whose sum is σ = 3881189196. Its totient is φ = 862486480.

The previous prime is 2156216173. The next prime is 2156216221. The reversal of 2156216210 is 126126512.

It can be written as a sum of positive squares in 2 ways, for example, as 2156023489 + 192721 = 46433^2 + 439^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2156216210.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107810801 + ... + 107810820.

Almost surely, 2^2156216210 is an apocalyptic number.

2156216210 is a deficient number, since it is larger than the sum of its proper divisors (1724972986).

2156216210 is a wasteful number, since it uses less digits than its factorization.

2156216210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215621628.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 2156216210 is about 46435.0752126019. The cubic root of 2156216210 is about 1291.9055646549.

The spelling of 2156216210 in words is "two billion, one hundred fifty-six million, two hundred sixteen thousand, two hundred ten".