2116722500 has 30 divisors (see below), whose sum is σ = 4628854230. Its totient is φ = 846688000.

The previous prime is 2116722469. The next prime is 2116722541. The reversal of 2116722500 is 52276112.

It can be written as a sum of positive squares in 5 ways, for example, as 187580416 + 1929142084 = 13696^2 + 43922^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2116722500.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 420845 + ... + 425844.

It is an arithmetic number, because the mean of its divisors is an integer number (154295141).

Almost surely, 2^2116722500 is an apocalyptic number.

2116722500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2116722500 is an abundant number, since it is smaller than the sum of its proper divisors (2512131730).

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

2116722500 is an equidigital number, since it uses as much as digits as its factorization.

2116722500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846713 (or 846696 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 2116722500 is about 46007.8525906176. The cubic root of 2116722500 is about 1283.9693067911.

Adding to 2116722500 its reverse (52276112), we get a palindrome (2168998612).

It can be divided in two parts, 2116 and 722500, that multiplied together give a square (1528810000 = 39100²).

The spelling of 2116722500 in words is "two billion, one hundred sixteen million, seven hundred twenty-two thousand, five hundred".