19980225 has 18 divisors (see below), whose sum is σ = 35787206. Its totient is φ = 10656000.

The previous prime is 19980211. The next prime is 19980227. The reversal of 19980225 is 52208991.

It can be written as a sum of positive squares in 3 ways, for example, as 186624 + 19793601 = 432^2 + 4449^2 .

It is not a de Polignac number, because 19980225 - 2¹³ = 19972033 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19980225.

It is not an unprimeable number, because it can be changed into a prime (19980227) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 44176 + ... + 44625.

Almost surely, 2^19980225 is an apocalyptic number.

19980225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19980225 is a deficient number, since it is larger than the sum of its proper divisors (15806981).

19980225 is a wasteful number, since it uses less digits than its factorization.

19980225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88817 (or 88809 counting only the distinct ones).

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

The square root of 19980225 is about 4469.9244960066. The cubic root of 19980225 is about 271.3522694773.

The spelling of 19980225 in words is "nineteen million, nine hundred eighty thousand, two hundred twenty-five".