13228271987 has 4 divisors (see below), whose sum is σ = 15118025136. Its totient is φ = 11338518840.

The previous prime is 13228271977. The next prime is 13228272037. The reversal of 13228271987 is 78917282231.

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 13228271987 - 2⁴ = 13228271971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13228271977) 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, 944876564 + ... + 944876577.

It is an arithmetic number, because the mean of its divisors is an integer number (3779506284).

Almost surely, 2^13228271987 is an apocalyptic number.

13228271987 is a deficient number, since it is larger than the sum of its proper divisors (1889753149).

13228271987 is an equidigital number, since it uses as much as digits as its factorization.

13228271987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1889753148.

The product of its digits is 677376, while the sum is 50.

The spelling of 13228271987 in words is "thirteen billion, two hundred twenty-eight million, two hundred seventy-one thousand, nine hundred eighty-seven".