13530911 has 4 divisors (see below), whose sum is σ = 13967424. Its totient is φ = 13094400.

The previous prime is 13530893. The next prime is 13530919. The reversal of 13530911 is 11903531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11903531 = 1321 ⋅9011.

It is not a de Polignac number, because 13530911 - 2¹⁸ = 13268767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13530919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218210 + ... + 218271.

It is an arithmetic number, because the mean of its divisors is an integer number (3491856).

Almost surely, 2^13530911 is an apocalyptic number.

13530911 is a deficient number, since it is larger than the sum of its proper divisors (436513).

13530911 is an equidigital number, since it uses as much as digits as its factorization.

13530911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436512.

The product of its (nonzero) digits is 405, while the sum is 23.

The square root of 13530911 is about 3678.4386633462. The cubic root of 13530911 is about 238.2917531692.

It can be divided in two parts, 13530 and 911, that added together give a palindrome (14441).

The spelling of 13530911 in words is "thirteen million, five hundred thirty thousand, nine hundred eleven".