13521374249 has 4 divisors (see below), whose sum is σ = 13525867920. Its totient is φ = 13516880580.

The previous prime is 13521374233. The next prime is 13521374281. The reversal of 13521374249 is 94247312531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13521374249 - 2⁴ = 13521374233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13521314249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2242319 + ... + 2248340.

It is an arithmetic number, because the mean of its divisors is an integer number (3381466980).

Almost surely, 2^13521374249 is an apocalyptic number.

It is an amenable number.

13521374249 is a deficient number, since it is larger than the sum of its proper divisors (4493671).

13521374249 is an equidigital number, since it uses as much as digits as its factorization.

13521374249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4493670.

The product of its digits is 181440, while the sum is 41.

The spelling of 13521374249 in words is "thirteen billion, five hundred twenty-one million, three hundred seventy-four thousand, two hundred forty-nine".