13403312511 has 4 divisors (see below), whose sum is σ = 17871083352. Its totient is φ = 8935541672.

The previous prime is 13403312477. The next prime is 13403312569. The reversal of 13403312511 is 11521330431.

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 13403312511 - 2²² = 13399118207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13403312591) 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, 2233885416 + ... + 2233885421.

It is an arithmetic number, because the mean of its divisors is an integer number (4467770838).

Almost surely, 2^13403312511 is an apocalyptic number.

13403312511 is a deficient number, since it is larger than the sum of its proper divisors (4467770841).

13403312511 is an equidigital number, since it uses as much as digits as its factorization.

13403312511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4467770840.

The product of its (nonzero) digits is 1080, while the sum is 24.

Adding to 13403312511 its reverse (11521330431), we get a palindrome (24924642942).

The spelling of 13403312511 in words is "thirteen billion, four hundred three million, three hundred twelve thousand, five hundred eleven".