15372280225 has 27 divisors (see below), whose sum is σ = 19308452331.
Its totient is φ = 12140611200.
The previous prime is 15372280223. The next prime is 15372280237. The reversal of 15372280225 is 52208227351.
The square root of 15372280225 is 123985.
It is a perfect power (a square), and thus also a powerful number.
It can be written as a sum of positive squares in 13 ways, for example, as 15332135329 + 40144896 = 123823^2 + 6336^2
It is not a de Polignac number, because 15372280225 - 21 = 15372280223 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (15372280223) 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 26 ways as a sum of consecutive naturals, for example, 84929635 + ... + 84929815.
Almost surely, 215372280225 is an apocalyptic number.
15372280225 is the 123985-th square number.
15372280225 is the 61993-rd centered octagonal number.
It is an amenable number.
15372280225 is a deficient number, since it is larger than the sum of its proper divisors (3936172106).
15372280225 is an frugal number, since it uses more digits than its factorization.
15372280225 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 646 (or 323 counting only the distinct ones).
The product of its (nonzero) digits is 67200, while the sum is 37.
The spelling of 15372280225 in words is "fifteen billion, three hundred seventy-two million, two hundred eighty thousand, two hundred twenty-five".