27125221 has 2 divisors, whose sum is σ = 27125222. Its totient is φ = 27125220.

The previous prime is 27125143. The next prime is 27125227. The reversal of 27125221 is 12252172.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24860196 + 2265025 = 4986^2 + 1505^2 .

It is a cyclic number.

It is not a de Polignac number, because 27125221 - 2⁹ = 27124709 is a prime.

It is a super-2 number, since 2×27125221² = 1471555228597682, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 27125192 and 27125201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27125227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13562610 + 13562611.

It is an arithmetic number, because the mean of its divisors is an integer number (13562611).

Almost surely, 2^27125221 is an apocalyptic number.

It is an amenable number.

27125221 is a deficient number, since it is larger than the sum of its proper divisors (1).

27125221 is an equidigital number, since it uses as much as digits as its factorization.

27125221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 560, while the sum is 22.

The square root of 27125221 is about 5208.1878806356. The cubic root of 27125221 is about 300.4630663456.

Adding to 27125221 its reverse (12252172), we get a palindrome (39377393).

The spelling of 27125221 in words is "twenty-seven million, one hundred twenty-five thousand, two hundred twenty-one".