27422821 has 2 divisors, whose sum is σ = 27422822. Its totient is φ = 27422820.

The previous prime is 27422803. The next prime is 27422839. The reversal of 27422821 is 12822472.

It is a balanced prime because it is at equal distance from previous prime (27422803) and next prime (27422839).

It can be written as a sum of positive squares in only one way, i.e., 22752900 + 4669921 = 4770^2 + 2161^2 .

It is a cyclic number.

It is not a de Polignac number, because 27422821 - 2¹¹ = 27420773 is a prime.

It is a super-2 number, since 2×27422821² = 1504022223196082, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27422821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27422861) 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 as a sum of consecutive naturals, namely, 13711410 + 13711411.

It is an arithmetic number, because the mean of its divisors is an integer number (13711411).

Almost surely, 2^27422821 is an apocalyptic number.

It is an amenable number.

27422821 is a deficient number, since it is larger than the sum of its proper divisors (1).

27422821 is an equidigital number, since it uses as much as digits as its factorization.

27422821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3584, while the sum is 28.

The square root of 27422821 is about 5236.6803415905. The cubic root of 27422821 is about 301.5578995298.

The spelling of 27422821 in words is "twenty-seven million, four hundred twenty-two thousand, eight hundred twenty-one".