13215442551344 has 80 divisors (see below), whose sum is σ = 28529050452480. Its totient is φ = 5878777831680.

The previous prime is 13215442551331. The next prime is 13215442551359. The reversal of 13215442551344 is 44315524451231.

It is a super-2 number, since 2×13215442551344² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 13215442551295 and 13215442551304.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129678842 + ... + 129780710.

It is an arithmetic number, because the mean of its divisors is an integer number (356613130656).

Almost surely, 2^{13215442551344} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13215442551344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14264525226240).

13215442551344 is an abundant number, since it is smaller than the sum of its proper divisors (15313607901136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13215442551344 is a wasteful number, since it uses less digits than its factorization.

13215442551344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117618 (or 117612 counting only the distinct ones).

The product of its digits is 1152000, while the sum is 44.

The spelling of 13215442551344 in words is "thirteen trillion, two hundred fifteen billion, four hundred forty-two million, five hundred fifty-one thousand, three hundred forty-four".