13123231252 has 6 divisors (see below), whose sum is σ = 22965654698. Its totient is φ = 6561615624.

The previous prime is 13123231237. The next prime is 13123231301. The reversal of 13123231252 is 25213232131.

It can be written as a sum of positive squares in only one way, i.e., 12860920836 + 262310416 = 113406^2 + 16196^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1640403903 + ... + 1640403910.

Almost surely, 2^13123231252 is an apocalyptic number.

It is an amenable number.

13123231252 is a deficient number, since it is larger than the sum of its proper divisors (9842423446).

13123231252 is a wasteful number, since it uses less digits than its factorization.

13123231252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3280807817 (or 3280807815 counting only the distinct ones).

The product of its digits is 2160, while the sum is 25.

Adding to 13123231252 its reverse (25213232131), we get a palindrome (38336463383).

The spelling of 13123231252 in words is "thirteen billion, one hundred twenty-three million, two hundred thirty-one thousand, two hundred fifty-two".