27253221 has 16 divisors (see below), whose sum is σ = 37324800. Its totient is φ = 17681648.

The previous prime is 27253211. The next prime is 27253253. The reversal of 27253221 is 12235272.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 27253221 - 2⁵ = 27253189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27253191 and 27253200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27253211) 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 15 ways as a sum of consecutive naturals, for example, 18220 + ... + 19658.

It is an arithmetic number, because the mean of its divisors is an integer number (2332800).

Almost surely, 2^27253221 is an apocalyptic number.

It is an amenable number.

27253221 is a deficient number, since it is larger than the sum of its proper divisors (10071579).

27253221 is a wasteful number, since it uses less digits than its factorization.

27253221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1608.

The product of its digits is 1680, while the sum is 24.

The square root of 27253221 is about 5220.4617611855. The cubic root of 27253221 is about 300.9349388267.

Adding to 27253221 its reverse (12235272), we get a palindrome (39488493).

The spelling of 27253221 in words is "twenty-seven million, two hundred fifty-three thousand, two hundred twenty-one".