27211404217 has 4 divisors (see below), whose sum is σ = 27216149796. Its totient is φ = 27206658640.

The previous prime is 27211404203. The next prime is 27211404239. The reversal of 27211404217 is 71240411272.

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 18284177961 + 8927226256 = 135219^2 + 94484^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27211404217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27211404247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2364178 + ... + 2375659.

It is an arithmetic number, because the mean of its divisors is an integer number (6804037449).

Almost surely, 2^27211404217 is an apocalyptic number.

It is an amenable number.

27211404217 is a deficient number, since it is larger than the sum of its proper divisors (4745579).

27211404217 is an equidigital number, since it uses as much as digits as its factorization.

27211404217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4745578.

The product of its (nonzero) digits is 6272, while the sum is 31.

Adding to 27211404217 its reverse (71240411272), we get a palindrome (98451815489).

The spelling of 27211404217 in words is "twenty-seven billion, two hundred eleven million, four hundred four thousand, two hundred seventeen".