12205231552 has 56 divisors (see below), whose sum is σ = 25589941200. Its totient is φ = 5759778816.

The previous prime is 12205231541. The next prime is 12205231553. The reversal of 12205231552 is 25513250221.

It is a self number, because there is not a number n which added to its sum of digits gives 12205231552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12205231553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308448 + ... + 345760.

Almost surely, 2^12205231552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12205231552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12794970600).

12205231552 is an abundant number, since it is smaller than the sum of its proper divisors (13384709648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12205231552 is a wasteful number, since it uses less digits than its factorization.

12205231552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37613 (or 37603 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

Adding to 12205231552 its reverse (25513250221), we get a palindrome (37718481773).

The spelling of 12205231552 in words is "twelve billion, two hundred five million, two hundred thirty-one thousand, five hundred fifty-two".