15225009 has 8 divisors (see below), whose sum is σ = 20644320. Its totient is φ = 9977856.

The previous prime is 15224983. The next prime is 15225031. The reversal of 15225009 is 90052251.

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

It is not a de Polignac number, because 15225009 - 2⁵ = 15224977 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 15225009.

It is not an unprimeable number, because it can be changed into a prime (15225079) 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, 42832 + ... + 43185.

It is an arithmetic number, because the mean of its divisors is an integer number (2580540).

Almost surely, 2^15225009 is an apocalyptic number.

It is an amenable number.

15225009 is a deficient number, since it is larger than the sum of its proper divisors (5419311).

15225009 is an equidigital number, since it uses as much as digits as its factorization.

15225009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86079.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 15225009 is about 3901.9237563028. The cubic root of 15225009 is about 247.8482476483.

The spelling of 15225009 in words is "fifteen million, two hundred twenty-five thousand, nine".