16225509 has 8 divisors (see below), whose sum is σ = 21767392. Its totient is φ = 10750320.

The previous prime is 16225507. The next prime is 16225519. The reversal of 16225509 is 90552261.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16225509 - 2¹ = 16225507 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16225507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16102 + ... + 17079.

It is an arithmetic number, because the mean of its divisors is an integer number (2720924).

Almost surely, 2^16225509 is an apocalyptic number.

It is an amenable number.

16225509 is a deficient number, since it is larger than the sum of its proper divisors (5541883).

16225509 is a wasteful number, since it uses less digits than its factorization.

16225509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33347.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 16225509 is about 4028.0899940294. The cubic root of 16225509 is about 253.1625393494.

The spelling of 16225509 in words is "sixteen million, two hundred twenty-five thousand, five hundred nine".