15209085 has 16 divisors (see below), whose sum is σ = 24577920. Its totient is φ = 8030400.

The previous prime is 15209081. The next prime is 15209099. The reversal of 15209085 is 58090251.

15209085 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15209085 - 2² = 15209081 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15209081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3505 + ... + 6534.

It is an arithmetic number, because the mean of its divisors is an integer number (1536120).

Almost surely, 2^15209085 is an apocalyptic number.

15209085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15209085 is a deficient number, since it is larger than the sum of its proper divisors (9368835).

15209085 is a wasteful number, since it uses less digits than its factorization.

15209085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10148.

The product of its (nonzero) digits is 3600, while the sum is 30.

The square root of 15209085 is about 3899.8826905434. The cubic root of 15209085 is about 247.7618084597.

The spelling of 15209085 in words is "fifteen million, two hundred nine thousand, eighty-five".