13521171232 has 12 divisors (see below), whose sum is σ = 26619805926. Its totient is φ = 6760585600.

The previous prime is 13521171227. The next prime is 13521171241. The reversal of 13521171232 is 23217112531.

It can be written as a sum of positive squares in only one way, i.e., 9736952976 + 3784218256 = 98676^2 + 61516^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13521171232.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211268269 + ... + 211268332.

Almost surely, 2^13521171232 is an apocalyptic number.

It is an amenable number.

13521171232 is a deficient number, since it is larger than the sum of its proper divisors (13098634694).

13521171232 is an equidigital number, since it uses as much as digits as its factorization.

13521171232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422536611 (or 422536603 counting only the distinct ones).

The product of its digits is 2520, while the sum is 28.

Adding to 13521171232 its reverse (23217112531), we get a palindrome (36738283763).

The spelling of 13521171232 in words is "thirteen billion, five hundred twenty-one million, one hundred seventy-one thousand, two hundred thirty-two".