27212005 has 8 divisors (see below), whose sum is σ = 33780600. Its totient is φ = 21018816.

The previous prime is 27211981. The next prime is 27212011. The reversal of 27212005 is 50021272.

It can be written as a sum of positive squares in 4 ways, for example, as 161604 + 27050401 = 402^2 + 5201^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27212005 - 2⁵ = 27211973 is a prime.

It is a super-2 number, since 2×27212005² = 1480986432240050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93690 + ... + 93979.

It is an arithmetic number, because the mean of its divisors is an integer number (4222575).

Almost surely, 2^27212005 is an apocalyptic number.

It is an amenable number.

27212005 is a deficient number, since it is larger than the sum of its proper divisors (6568595).

27212005 is a wasteful number, since it uses less digits than its factorization.

27212005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187703.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 27212005 is about 5216.5127240332. The cubic root of 27212005 is about 300.7831574726.

Adding to 27212005 its reverse (50021272), we get a palindrome (77233277).

The spelling of 27212005 in words is "twenty-seven million, two hundred twelve thousand, five".