15125550 has 96 divisors (see below), whose sum is σ = 41783040. Its totient is φ = 3590400.

The previous prime is 15125549. The next prime is 15125557. The reversal of 15125550 is 5552151.

It is a self number, because there is not a number n which added to its sum of digits gives 15125550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15125557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 146799 + ... + 146901.

It is an arithmetic number, because the mean of its divisors is an integer number (435240).

Almost surely, 2^15125550 is an apocalyptic number.

15125550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 15125550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20891520).

15125550 is an abundant number, since it is smaller than the sum of its proper divisors (26657490).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15125550 is a wasteful number, since it uses less digits than its factorization.

15125550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218 (or 213 counting only the distinct ones).

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

The square root of 15125550 is about 3889.1580065613. The cubic root of 15125550 is about 247.3073697549.

The spelling of 15125550 in words is "fifteen million, one hundred twenty-five thousand, five hundred fifty".