15225000 has 192 divisors, whose sum is σ = 56246400. Its totient is φ = 3360000.

The previous prime is 15224983. The next prime is 15225031. The reversal of 15225000 is 52251.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 524986 + ... + 525014.

It is an arithmetic number, because the mean of its divisors is an integer number (292950).

Almost surely, 2^15225000 is an apocalyptic number.

15225000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15225000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28123200).

15225000 is an abundant number, since it is smaller than the sum of its proper divisors (41021400).

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

15225000 is an equidigital number, since it uses as much as digits as its factorization.

15225000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70 (or 46 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 15225000 is about 3901.9226030253. The cubic root of 15225000 is about 247.8481988112.

Adding to 15225000 its reverse (52251), we get a palindrome (15277251).

It can be divided in two parts, 152 and 25000, that added together give a palindrome (25152).

The spelling of 15225000 in words is "fifteen million, two hundred twenty-five thousand".