15105009 has 4 divisors (see below), whose sum is σ = 20140016. Its totient is φ = 10070004.

The previous prime is 15104989. The next prime is 15105017. The reversal of 15105009 is 90050151.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90050151 = 3 ⋅30016717.

It is not a de Polignac number, because 15105009 - 2⁹ = 15104497 is a prime.

It is a super-2 number, since 2×15105009² = 456322593780162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15105109) 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, 2517499 + ... + 2517504.

It is an arithmetic number, because the mean of its divisors is an integer number (5035004).

Almost surely, 2^15105009 is an apocalyptic number.

It is an amenable number.

15105009 is a deficient number, since it is larger than the sum of its proper divisors (5035007).

15105009 is an equidigital number, since it uses as much as digits as its factorization.

15105009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5035006.

The product of its (nonzero) digits is 225, while the sum is 21.

The square root of 15105009 is about 3886.5163064112. The cubic root of 15105009 is about 247.1953684944.

The spelling of 15105009 in words is "fifteen million, one hundred five thousand, nine".