2161850650 has 12 divisors (see below), whose sum is σ = 4021042302. Its totient is φ = 864740240.

The previous prime is 2161850633. The next prime is 2161850651. The reversal of 2161850650 is 560581612.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 994330089 + 1167520561 = 31533^2 + 34169^2 .

It is not an unprimeable number, because it can be changed into a prime (2161850651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21618457 + ... + 21618556.

Almost surely, 2^2161850650 is an apocalyptic number.

2161850650 is a deficient number, since it is larger than the sum of its proper divisors (1859191652).

2161850650 is a wasteful number, since it uses less digits than its factorization.

2161850650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43237025 (or 43237020 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 2161850650 is about 46495.7057156895. The cubic root of 2161850650 is about 1293.0298849828.

The spelling of 2161850650 in words is "two billion, one hundred sixty-one million, eight hundred fifty thousand, six hundred fifty".