220312271 has 2 divisors, whose sum is σ = 220312272. Its totient is φ = 220312270.

The previous prime is 220312243. The next prime is 220312273. The reversal of 220312271 is 172213022.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220312271 is a prime.

Together with 220312273, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220312273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110156135 + 110156136.

It is an arithmetic number, because the mean of its divisors is an integer number (110156136).

Almost surely, 2^220312271 is an apocalyptic number.

220312271 is a deficient number, since it is larger than the sum of its proper divisors (1).

220312271 is an equidigital number, since it uses as much as digits as its factorization.

220312271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 220312271 is about 14842.9198946838. The cubic root of 220312271 is about 603.9665630292.

Adding to 220312271 its reverse (172213022), we get a palindrome (392525293).

The spelling of 220312271 in words is "two hundred twenty million, three hundred twelve thousand, two hundred seventy-one".