13620211 has 4 divisors (see below), whose sum is σ = 14858424. Its totient is φ = 12382000.

The previous prime is 13620199. The next prime is 13620223. The reversal of 13620211 is 11202631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11202631 = 11 ⋅1018421.

It is an interprime number because it is at equal distance from previous prime (13620199) and next prime (13620223).

It is a cyclic number.

It is not a de Polignac number, because 13620211 - 2¹⁷ = 13489139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13620011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 619090 + ... + 619111.

It is an arithmetic number, because the mean of its divisors is an integer number (3714606).

Almost surely, 2^13620211 is an apocalyptic number.

13620211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13620211 is a deficient number, since it is larger than the sum of its proper divisors (1238213).

13620211 is a wasteful number, since it uses less digits than its factorization.

13620211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238212.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 13620211 is about 3690.5570040307. The cubic root of 13620211 is about 238.8148224523.

Adding to 13620211 its reverse (11202631), we get a palindrome (24822842).

It can be divided in two parts, 13620 and 211, that added together give a palindrome (13831).

The spelling of 13620211 in words is "thirteen million, six hundred twenty thousand, two hundred eleven".