12505225352 has 8 divisors (see below), whose sum is σ = 23447297550. Its totient is φ = 6252612672.

The previous prime is 12505225351. The next prime is 12505225367. The reversal of 12505225352 is 25352250521.

It can be written as a sum of positive squares in only one way, i.e., 12491638756 + 13586596 = 111766^2 + 3686^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×12505225352² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12505225351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 781576577 + ... + 781576592.

Almost surely, 2^12505225352 is an apocalyptic number.

It is an amenable number.

12505225352 is a deficient number, since it is larger than the sum of its proper divisors (10942072198).

12505225352 is a wasteful number, since it uses less digits than its factorization.

12505225352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1563153175 (or 1563153171 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 32.

Adding to 12505225352 its reverse (25352250521), we get a palindrome (37857475873).

The spelling of 12505225352 in words is "twelve billion, five hundred five million, two hundred twenty-five thousand, three hundred fifty-two".