13215817448 has 16 divisors (see below), whose sum is σ = 24783468000. Its totient is φ = 6606892656.

The previous prime is 13215817427. The next prime is 13215817487. The reversal of 13215817448 is 84471851231.

It is a super-2 number, since 2×13215817448² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13215817399 and 13215817408.

It is an unprimeable number.

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, 70238 + ... + 177101.

It is an arithmetic number, because the mean of its divisors is an integer number (1548966750).

Almost surely, 2^13215817448 is an apocalyptic number.

It is an amenable number.

13215817448 is a deficient number, since it is larger than the sum of its proper divisors (11567650552).

13215817448 is a wasteful number, since it uses less digits than its factorization.

13215817448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254024 (or 254020 counting only the distinct ones).

The product of its digits is 215040, while the sum is 44.

The spelling of 13215817448 in words is "thirteen billion, two hundred fifteen million, eight hundred seventeen thousand, four hundred forty-eight".