2188722050 has 24 divisors (see below), whose sum is σ = 4181054196. Its totient is φ = 851826240.

The previous prime is 2188722049. The next prime is 2188722061. The reversal of 2188722050 is 502278812.

It can be written as a sum of positive squares in 6 ways, for example, as 1100447929 + 1088274121 = 33173^2 + 32989^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2188722050.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 589697 + ... + 593396.

Almost surely, 2^2188722050 is an apocalyptic number.

2188722050 is a deficient number, since it is larger than the sum of its proper divisors (1992332146).

2188722050 is a wasteful number, since it uses less digits than its factorization.

2188722050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183142 (or 1183137 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 2188722050 is about 46783.7797746185. The cubic root of 2188722050 is about 1298.3652133159.

The spelling of 2188722050 in words is "two billion, one hundred eighty-eight million, seven hundred twenty-two thousand, fifty".