13215221148645 has 64 divisors (see below), whose sum is σ = 23760397543680. Its totient is φ = 6968266444800.

The previous prime is 13215221148557. The next prime is 13215221148653. The reversal of 13215221148645 is 54684112251231.

13215221148645 is a `hidden beast` number, since 1 + 3 + 2 + 1 + 522 + 1 + 1 + 4 + 86 + 45 = 666.

It is not a de Polignac number, because 13215221148645 - 2¹³ = 13215221140453 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 13215221148645.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12195585 + ... + 13234905.

It is an arithmetic number, because the mean of its divisors is an integer number (371256211620).

Almost surely, 2^{13215221148645} is an apocalyptic number.

13215221148645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13215221148645 is a deficient number, since it is larger than the sum of its proper divisors (10545176395035).

13215221148645 is a wasteful number, since it uses less digits than its factorization.

13215221148645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040403 (or 1040397 counting only the distinct ones).

The product of its digits is 460800, while the sum is 45.

Adding to 13215221148645 its reverse (54684112251231), we get a palindrome (67899333399876).

The spelling of 13215221148645 in words is "thirteen trillion, two hundred fifteen billion, two hundred twenty-one million, one hundred forty-eight thousand, six hundred forty-five".