15244040225 has 6 divisors (see below), whose sum is σ = 18902609910. Its totient is φ = 12195232160.

The previous prime is 15244040177. The next prime is 15244040261. The reversal of 15244040225 is 52204044251.

It can be written as a sum of positive squares in 3 ways, for example, as 201753616 + 15042286609 = 14204^2 + 122647^2 .

It is not a de Polignac number, because 15244040225 - 2⁸ = 15244039969 is a prime.

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, 304880780 + ... + 304880829.

It is an arithmetic number, because the mean of its divisors is an integer number (3150434985).

Almost surely, 2^15244040225 is an apocalyptic number.

It is an amenable number.

15244040225 is a deficient number, since it is larger than the sum of its proper divisors (3658569685).

15244040225 is an equidigital number, since it uses as much as digits as its factorization.

15244040225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609761619 (or 609761614 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 29.

Adding to 15244040225 its reverse (52204044251), we get a palindrome (67448084476).

The spelling of 15244040225 in words is "fifteen billion, two hundred forty-four million, forty thousand, two hundred twenty-five".