19853225 has 24 divisors (see below), whose sum is σ = 28831488. Its totient is φ = 13276800.

The previous prime is 19853221. The next prime is 19853279. The reversal of 19853225 is 52235891.

It is not a de Polignac number, because 19853225 - 2² = 19853221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19853221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5792 + ... + 8558.

It is an arithmetic number, because the mean of its divisors is an integer number (1201312).

Almost surely, 2^19853225 is an apocalyptic number.

It is an amenable number.

19853225 is a deficient number, since it is larger than the sum of its proper divisors (8978263).

19853225 is a wasteful number, since it uses less digits than its factorization.

19853225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2825 (or 2820 counting only the distinct ones).

The product of its digits is 21600, while the sum is 35.

The square root of 19853225 is about 4455.6957930272. The cubic root of 19853225 is about 270.7761162496.

The spelling of 19853225 in words is "nineteen million, eight hundred fifty-three thousand, two hundred twenty-five".