27013521 has 4 divisors (see below), whose sum is σ = 36018032. Its totient is φ = 18009012.

The previous prime is 27013507. The next prime is 27013531. The reversal of 27013521 is 12531072.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 27013521 - 2⁵ = 27013489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27013531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4502251 + ... + 4502256.

It is an arithmetic number, because the mean of its divisors is an integer number (9004508).

Almost surely, 2^27013521 is an apocalyptic number.

It is an amenable number.

27013521 is a deficient number, since it is larger than the sum of its proper divisors (9004511).

27013521 is an equidigital number, since it uses as much as digits as its factorization.

27013521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9004510.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 27013521 is about 5197.4533186937. The cubic root of 27013521 is about 300.0500694208.

Adding to 27013521 its reverse (12531072), we get a palindrome (39544593).

The spelling of 27013521 in words is "twenty-seven million, thirteen thousand, five hundred twenty-one".