12540235224 has 32 divisors (see below), whose sum is σ = 34200642240. Its totient is φ = 3800071200.

The previous prime is 12540235223. The next prime is 12540235231. The reversal of 12540235224 is 42253204521.

It is a junction number, because it is equal to n+sod(n) for n = 12540235191 and 12540235200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12540235223) 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, 23750182 + ... + 23750709.

It is an arithmetic number, because the mean of its divisors is an integer number (1068770070).

Almost surely, 2^12540235224 is an apocalyptic number.

It is an amenable number.

12540235224 is an abundant number, since it is smaller than the sum of its proper divisors (21660407016).

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

12540235224 is a wasteful number, since it uses less digits than its factorization.

12540235224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47500911 (or 47500907 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 12540235224 its reverse (42253204521), we get a palindrome (54793439745).

The spelling of 12540235224 in words is "twelve billion, five hundred forty million, two hundred thirty-five thousand, two hundred twenty-four".