22212271 has 2 divisors, whose sum is σ = 22212272. Its totient is φ = 22212270.

The previous prime is 22212257. The next prime is 22212277. The reversal of 22212271 is 17221222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22212271 - 2¹³ = 22204079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22212277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11106135 + 11106136.

It is an arithmetic number, because the mean of its divisors is an integer number (11106136).

Almost surely, 2^22212271 is an apocalyptic number.

22212271 is a deficient number, since it is larger than the sum of its proper divisors (1).

22212271 is an equidigital number, since it uses as much as digits as its factorization.

22212271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 224, while the sum is 19.

The square root of 22212271 is about 4712.9896032137. The cubic root of 22212271 is about 281.1022495721.

Adding to 22212271 its reverse (17221222), we get a palindrome (39433493).

The spelling of 22212271 in words is "twenty-two million, two hundred twelve thousand, two hundred seventy-one".