15244250225 has 6 divisors (see below), whose sum is σ = 18902870310. Its totient is φ = 12195400160.

The previous prime is 15244250213. The next prime is 15244250249. The reversal of 15244250225 is 52205244251.

It can be written as a sum of positive squares in 3 ways, for example, as 1320014224 + 13924236001 = 36332^2 + 118001^2 .

It is a de Polignac number, because none of the positive numbers 2^k-15244250225 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15244250191 and 15244250200.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 304884980 + ... + 304885029.

It is an arithmetic number, because the mean of its divisors is an integer number (3150478385).

Almost surely, 2^15244250225 is an apocalyptic number.

It is an amenable number.

15244250225 is a deficient number, since it is larger than the sum of its proper divisors (3658620085).

15244250225 is an equidigital number, since it uses as much as digits as its factorization.

15244250225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609770019 (or 609770014 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 32.

Adding to 15244250225 its reverse (52205244251), we get a palindrome (67449494476).

The spelling of 15244250225 in words is "fifteen billion, two hundred forty-four million, two hundred fifty thousand, two hundred twenty-five".