21455450302471 has 2 divisors, whose sum is σ = 21455450302472. Its totient is φ = 21455450302470.

The previous prime is 21455450302439. The next prime is 21455450302519. The reversal of 21455450302471 is 17420305455412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21455450302471 - 2⁵ = 21455450302439 is a prime.

It is a super-3 number, since 3×21455450302471³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21455450302421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10727725151235 + 10727725151236.

It is an arithmetic number, because the mean of its divisors is an integer number (10727725151236).

Almost surely, 2^{21455450302471} is an apocalyptic number.

21455450302471 is a deficient number, since it is larger than the sum of its proper divisors (1).

21455450302471 is an equidigital number, since it uses as much as digits as its factorization.

21455450302471 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672000, while the sum is 43.

Adding to 21455450302471 its reverse (17420305455412), we get a palindrome (38875755757883).

The spelling of 21455450302471 in words is "twenty-one trillion, four hundred fifty-five billion, four hundred fifty million, three hundred two thousand, four hundred seventy-one".