13311132551 has 4 divisors (see below), whose sum is σ = 13385496600. Its totient is φ = 13236768504.

The previous prime is 13311132511. The next prime is 13311132619. The reversal of 13311132551 is 15523111331.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13311132551 - 2²⁶ = 13244023687 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13311132551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13311132511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37181756 + ... + 37182113.

It is an arithmetic number, because the mean of its divisors is an integer number (3346374150).

Almost surely, 2^13311132551 is an apocalyptic number.

13311132551 is a deficient number, since it is larger than the sum of its proper divisors (74364049).

13311132551 is an equidigital number, since it uses as much as digits as its factorization.

13311132551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74364048.

The product of its digits is 1350, while the sum is 26.

Adding to 13311132551 its reverse (15523111331), we get a palindrome (28834243882).

The spelling of 13311132551 in words is "thirteen billion, three hundred eleven million, one hundred thirty-two thousand, five hundred fifty-one".