13240551523 has 4 divisors (see below), whose sum is σ = 13278709080. Its totient is φ = 13202393968.

The previous prime is 13240551509. The next prime is 13240551539. The reversal of 13240551523 is 32515504231.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13240551523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13240551563) 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, 19078258 + ... + 19078951.

It is an arithmetic number, because the mean of its divisors is an integer number (3319677270).

Almost surely, 2^13240551523 is an apocalyptic number.

13240551523 is a deficient number, since it is larger than the sum of its proper divisors (38157557).

13240551523 is an equidigital number, since it uses as much as digits as its factorization.

13240551523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38157556.

The product of its (nonzero) digits is 18000, while the sum is 31.

The spelling of 13240551523 in words is "thirteen billion, two hundred forty million, five hundred fifty-one thousand, five hundred twenty-three".