13231156550 has 24 divisors (see below), whose sum is σ = 24853623552. Its totient is φ = 5240060000.

The previous prime is 13231156529. The next prime is 13231156577. The reversal of 13231156550 is 5565113231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1304966 + ... + 1315065.

It is an arithmetic number, because the mean of its divisors is an integer number (1035567648).

Almost surely, 2^13231156550 is an apocalyptic number.

13231156550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13231156550 is a deficient number, since it is larger than the sum of its proper divisors (11622467002).

13231156550 is a wasteful number, since it uses less digits than its factorization.

13231156550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2620144 (or 2620139 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 32.

Adding to 13231156550 its reverse (5565113231), we get a palindrome (18796269781).

The spelling of 13231156550 in words is "thirteen billion, two hundred thirty-one million, one hundred fifty-six thousand, five hundred fifty".