214221481 has 2 divisors, whose sum is σ = 214221482. Its totient is φ = 214221480.

The previous prime is 214221479. The next prime is 214221503. The reversal of 214221481 is 184122412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177315856 + 36905625 = 13316^2 + 6075^2 .

It is a cyclic number.

It is not a de Polignac number, because 214221481 - 2¹ = 214221479 is a prime.

It is a super-2 number, since 2×214221481² = 91781685843666722, which contains 22 as substring.

Together with 214221479, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (214221401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107110740 + 107110741.

It is an arithmetic number, because the mean of its divisors is an integer number (107110741).

Almost surely, 2^214221481 is an apocalyptic number.

It is an amenable number.

214221481 is a deficient number, since it is larger than the sum of its proper divisors (1).

214221481 is an equidigital number, since it uses as much as digits as its factorization.

214221481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1024, while the sum is 25.

The square root of 214221481 is about 14636.3069454012. The cubic root of 214221481 is about 598.3486825687.

Adding to 214221481 its reverse (184122412), we get a palindrome (398343893).

It can be divided in two parts, 214221 and 481, that multiplied together give a palindrome (103040301).

The spelling of 214221481 in words is "two hundred fourteen million, two hundred twenty-one thousand, four hundred eighty-one".