13820215 has 8 divisors (see below), whose sum is σ = 16612128. Its totient is φ = 11037600.

The previous prime is 13820189. The next prime is 13820237. The reversal of 13820215 is 51202831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13820215 - 2¹³ = 13812023 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 1534 + ... + 5476.

It is an arithmetic number, because the mean of its divisors is an integer number (2076516).

Almost surely, 2^13820215 is an apocalyptic number.

13820215 is a deficient number, since it is larger than the sum of its proper divisors (2791913).

13820215 is an equidigital number, since it uses as much as digits as its factorization.

13820215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4649.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 13820215 is about 3717.5549760562. The cubic root of 13820215 is about 239.9780940654.

The spelling of 13820215 in words is "thirteen million, eight hundred twenty thousand, two hundred fifteen".