13400215321 has 4 divisors (see below), whose sum is σ = 13619891044. Its totient is φ = 13180539600.

The previous prime is 13400215277. The next prime is 13400215351. The reversal of 13400215321 is 12351200431.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12351200431 = 41 ⋅301248791.

It can be written as a sum of positive squares in 2 ways, for example, as 7667454096 + 5732761225 = 87564^2 + 75715^2 .

It is a cyclic number.

It is not a de Polignac number, because 13400215321 - 2⁷ = 13400215193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13400215292 and 13400215301.

It is not an unprimeable number, because it can be changed into a prime (13400215351) 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, 109837770 + ... + 109837891.

It is an arithmetic number, because the mean of its divisors is an integer number (3404972761).

Almost surely, 2^13400215321 is an apocalyptic number.

It is an amenable number.

13400215321 is a deficient number, since it is larger than the sum of its proper divisors (219675723).

13400215321 is an equidigital number, since it uses as much as digits as its factorization.

13400215321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219675722.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 13400215321 its reverse (12351200431), we get a palindrome (25751415752).

The spelling of 13400215321 in words is "thirteen billion, four hundred million, two hundred fifteen thousand, three hundred twenty-one".