13321015 has 4 divisors (see below), whose sum is σ = 15985224. Its totient is φ = 10656808.

The previous prime is 13321003. The next prime is 13321027. The reversal of 13321015 is 51012331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51012331 = 719 ⋅70949.

It is an interprime number because it is at equal distance from previous prime (13321003) and next prime (13321027).

It is a cyclic number.

It is not a de Polignac number, because 13321015 - 2¹⁹ = 12796727 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13321015.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1332097 + ... + 1332106.

It is an arithmetic number, because the mean of its divisors is an integer number (3996306).

Almost surely, 2^13321015 is an apocalyptic number.

13321015 is a deficient number, since it is larger than the sum of its proper divisors (2664209).

13321015 is an equidigital number, since it uses as much as digits as its factorization.

13321015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2664208.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 13321015 is about 3649.7965696734. The cubic root of 13321015 is about 237.0531728035.

Adding to 13321015 its reverse (51012331), we get a palindrome (64333346).

It can be divided in two parts, 133210 and 15, that added together give a square (133225 = 365²).

The spelling of 13321015 in words is "thirteen million, three hundred twenty-one thousand, fifteen".