16722500 has 30 divisors (see below), whose sum is σ = 36574230. Its totient is φ = 6688000.

The previous prime is 16722499. The next prime is 16722521. The reversal of 16722500 is 522761.

It can be written as a sum of positive squares in 5 ways, for example, as 3748096 + 12974404 = 1936^2 + 3602^2 .

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 9 ways as a sum of consecutive naturals, for example, 845 + ... + 5844.

It is an arithmetic number, because the mean of its divisors is an integer number (1219141).

Almost surely, 2^16722500 is an apocalyptic number.

16722500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16722500 is an abundant number, since it is smaller than the sum of its proper divisors (19851730).

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

16722500 is an equidigital number, since it uses as much as digits as its factorization.

16722500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6713 (or 6696 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 16722500 is about 4089.3153461185. The cubic root of 16722500 is about 255.7213969407.

It can be divided in two parts, 16 and 722500, that multiplied together give a square (11560000 = 3400²).

The spelling of 16722500 in words is "sixteen million, seven hundred twenty-two thousand, five hundred".