19730225 has 12 divisors (see below), whose sum is σ = 25063500. Its totient is φ = 15398400.

The previous prime is 19730209. The next prime is 19730231. The reversal of 19730225 is 52203791.

It can be written as a sum of positive squares in 6 ways, for example, as 1343281 + 18386944 = 1159^2 + 4288^2 .

It is not a de Polignac number, because 19730225 - 2⁴ = 19730209 is a prime.

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, 8600 + ... + 10649.

It is an arithmetic number, because the mean of its divisors is an integer number (2088625).

Almost surely, 2^19730225 is an apocalyptic number.

It is an amenable number.

19730225 is a deficient number, since it is larger than the sum of its proper divisors (5333275).

19730225 is a wasteful number, since it uses less digits than its factorization.

19730225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19300 (or 19295 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 19730225 is about 4441.8717901353. The cubic root of 19730225 is about 270.2157626046.

The spelling of 19730225 in words is "nineteen million, seven hundred thirty thousand, two hundred twenty-five".