27216461 has 2 divisors, whose sum is σ = 27216462. Its totient is φ = 27216460.

The previous prime is 27216443. The next prime is 27216479. The reversal of 27216461 is 16461272.

It is a balanced prime because it is at equal distance from previous prime (27216443) and next prime (27216479).

It can be written as a sum of positive squares in only one way, i.e., 27144100 + 72361 = 5210^2 + 269^2 .

It is a cyclic number.

It is not a de Polignac number, because 27216461 - 2¹⁰ = 27215437 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27216361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13608230 + 13608231.

It is an arithmetic number, because the mean of its divisors is an integer number (13608231).

Almost surely, 2^27216461 is an apocalyptic number.

It is an amenable number.

27216461 is a deficient number, since it is larger than the sum of its proper divisors (1).

27216461 is an equidigital number, since it uses as much as digits as its factorization.

27216461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 29.

The square root of 27216461 is about 5216.9398118054. The cubic root of 27216461 is about 300.7995744498.

The spelling of 27216461 in words is "twenty-seven million, two hundred sixteen thousand, four hundred sixty-one".