15225109 has 4 divisors (see below), whose sum is σ = 15235020. Its totient is φ = 15215200.

The previous prime is 15225101. The next prime is 15225113. The reversal of 15225109 is 90152251.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5049009 + 10176100 = 2247^2 + 3190^2 .

It is a cyclic number.

It is not a de Polignac number, because 15225109 - 2³ = 15225101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15225101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2104 + ... + 5905.

It is an arithmetic number, because the mean of its divisors is an integer number (3808755).

Almost surely, 2^15225109 is an apocalyptic number.

It is an amenable number.

15225109 is a deficient number, since it is larger than the sum of its proper divisors (9911).

15225109 is an equidigital number, since it uses as much as digits as its factorization.

15225109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9910.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 15225109 is about 3901.9365704737. The cubic root of 15225109 is about 247.8487902812.

The spelling of 15225109 in words is "fifteen million, two hundred twenty-five thousand, one hundred nine".