12473539225 has 27 divisors (see below), whose sum is σ = 17998084191. Its totient is φ = 8550603600.

The previous prime is 12473539213. The next prime is 12473539229. The reversal of 12473539225 is 52293537421.

The square root of 12473539225 is 111685.

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

It can be written as a sum of positive squares in only one way, i.e., 4490474121 + 7983065104 = 67011^2 + 89348^2 .

It is not a de Polignac number, because 12473539225 - 2⁷ = 12473539097 is a prime.

It is a super-2 number, since 2×12473539225² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12473539229) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3907380 + ... + 3910570.

Almost surely, 2^12473539225 is an apocalyptic number.

12473539225 is the 111685-th square number.

12473539225 is the 55843-rd centered octagonal number.

It is an amenable number.

12473539225 is a deficient number, since it is larger than the sum of its proper divisors (5524544966).

12473539225 is an frugal number, since it uses more digits than its factorization.

12473539225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6406 (or 3203 counting only the distinct ones).

The product of its digits is 453600, while the sum is 43.

The spelling of 12473539225 in words is "twelve billion, four hundred seventy-three million, five hundred thirty-nine thousand, two hundred twenty-five".