13231436550 has 48 divisors (see below), whose sum is σ = 34240665600. Its totient is φ = 3374974240.

The previous prime is 13231436513. The next prime is 13231436593. The reversal of 13231436550 is 5563413231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1914150 + ... + 1921049.

It is an arithmetic number, because the mean of its divisors is an integer number (713347200).

Almost surely, 2^13231436550 is an apocalyptic number.

13231436550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13231436550 is an abundant number, since it is smaller than the sum of its proper divisors (21009229050).

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

13231436550 is a wasteful number, since it uses less digits than its factorization.

13231436550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3835237 (or 3835232 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 33.

Adding to 13231436550 its reverse (5563413231), we get a palindrome (18794849781).

The spelling of 13231436550 in words is "thirteen billion, two hundred thirty-one million, four hundred thirty-six thousand, five hundred fifty".