15125310225 has 63 divisors (see below), whose sum is σ = 28151114539. Its totient is φ = 8057977200.

The previous prime is 15125310197. The next prime is 15125310229. The reversal of 15125310225 is 52201352151.

The square root of 15125310225 is 122985.

It is a perfect power (a square), and thus also a powerful number.

15125310225 is a `hidden beast` number, since 1 + 5 + 125 + 310 + 225 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5445111681 + 9680198544 = 73791^2 + 98388^2 .

It is a de Polignac number, because none of the positive numbers 2^k-15125310225 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15125310229) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 16602520 + ... + 16603430.

Almost surely, 2^15125310225 is an apocalyptic number.

15125310225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15125310225 is the 122985-th square number.

15125310225 is the 61493-rd centered octagonal number.

It is an amenable number.

15125310225 is a deficient number, since it is larger than the sum of its proper divisors (13025804314).

15125310225 is an frugal number, since it uses more digits than its factorization.

15125310225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850 (or 919 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

Adding to 15125310225 its reverse (52201352151), we get a palindrome (67326662376).

The spelling of 15125310225 in words is "fifteen billion, one hundred twenty-five million, three hundred ten thousand, two hundred twenty-five".