21614141 has 2 divisors, whose sum is σ = 21614142. Its totient is φ = 21614140.

The previous prime is 21614057. The next prime is 21614143. The reversal of 21614141 is 14141612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21436900 + 177241 = 4630^2 + 421^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21614141 is a prime.

Together with 21614143, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21614143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10807070 + 10807071.

It is an arithmetic number, because the mean of its divisors is an integer number (10807071).

Almost surely, 2^21614141 is an apocalyptic number.

It is an amenable number.

21614141 is a deficient number, since it is larger than the sum of its proper divisors (1).

21614141 is an equidigital number, since it uses as much as digits as its factorization.

21614141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 20.

The square root of 21614141 is about 4649.1010959109. The cubic root of 21614141 is about 278.5560914884.

Adding to 21614141 its reverse (14141612), we get a palindrome (35755753).

The spelling of 21614141 in words is "twenty-one million, six hundred fourteen thousand, one hundred forty-one".