15109375 has 14 divisors (see below), whose sum is σ = 18906008. Its totient is φ = 12075000.

The previous prime is 15109373. The next prime is 15109387. The reversal of 15109375 is 57390151.

It is not a de Polignac number, because 15109375 - 2¹ = 15109373 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 (15109373) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 15142 + ... + 16108.

Almost surely, 2^15109375 is an apocalyptic number.

15109375 is a deficient number, since it is larger than the sum of its proper divisors (3796633).

15109375 is an frugal number, since it uses more digits than its factorization.

15109375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997 (or 972 counting only the distinct ones).

The product of its (nonzero) digits is 4725, while the sum is 31.

The square root of 15109375 is about 3887.0779513666. The cubic root of 15109375 is about 247.2191829128.

The spelling of 15109375 in words is "fifteen million, one hundred nine thousand, three hundred seventy-five".