27216457 has 4 divisors (see below), whose sum is σ = 27297556. Its totient is φ = 27135360.

The previous prime is 27216443. The next prime is 27216461. The reversal of 27216457 is 75461272.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6885376 + 20331081 = 2624^2 + 4509^2 .

It is a cyclic number.

It is not a de Polignac number, because 27216457 - 2¹¹ = 27214409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27216437) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 40044 + ... + 40717.

It is an arithmetic number, because the mean of its divisors is an integer number (6824389).

Almost surely, 2^27216457 is an apocalyptic number.

It is an amenable number.

27216457 is a deficient number, since it is larger than the sum of its proper divisors (81099).

27216457 is an equidigital number, since it uses as much as digits as its factorization.

27216457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81098.

The product of its digits is 23520, while the sum is 34.

The square root of 27216457 is about 5216.9394284389. The cubic root of 27216457 is about 300.7995597136.

The spelling of 27216457 in words is "twenty-seven million, two hundred sixteen thousand, four hundred fifty-seven".