2191316850 has 72 divisors (see below), whose sum is σ = 6090385860. Its totient is φ = 564197760.

The previous prime is 2191316849. The next prime is 2191316899. The reversal of 2191316850 is 586131912.

2191316850 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 718829721 + 1472487129 = 26811^2 + 38373^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 70909 + ... + 97008.

Almost surely, 2^2191316850 is an apocalyptic number.

2191316850 is an abundant number, since it is smaller than the sum of its proper divisors (3899069010).

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

2191316850 is a wasteful number, since it uses less digits than its factorization.

2191316850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167964 (or 167956 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 2191316850 is about 46811.5033939309. The cubic root of 2191316850 is about 1298.8780951869.

The spelling of 2191316850 in words is "two billion, one hundred ninety-one million, three hundred sixteen thousand, eight hundred fifty".