15505125 has 32 divisors (see below), whose sum is σ = 26058240. Its totient is φ = 8187200.

The previous prime is 15505123. The next prime is 15505129. The reversal of 15505125 is 52150551.

It is not a de Polignac number, because 15505125 - 2¹ = 15505123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15505095 and 15505104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15505123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64756 + ... + 64994.

It is an arithmetic number, because the mean of its divisors is an integer number (814320).

Almost surely, 2^15505125 is an apocalyptic number.

15505125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15505125 is a deficient number, since it is larger than the sum of its proper divisors (10553115).

15505125 is a wasteful number, since it uses less digits than its factorization.

15505125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430 (or 420 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 24.

The square root of 15505125 is about 3937.6547588635. The cubic root of 15505125 is about 249.3590246737.

Adding to 15505125 its reverse (52150551), we get a palindrome (67655676).

The spelling of 15505125 in words is "fifteen million, five hundred five thousand, one hundred twenty-five".