811224481 has 2 divisors, whose sum is σ = 811224482. Its totient is φ = 811224480.

The previous prime is 811224457. The next prime is 811224497. The reversal of 811224481 is 184422118.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 810256225 + 968256 = 28465^2 + 984^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-811224481 is a prime.

It is a super-2 number, since 2×811224481² = 1316170317147438722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (811224781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405612240 + 405612241.

It is an arithmetic number, because the mean of its divisors is an integer number (405612241).

Almost surely, 2^811224481 is an apocalyptic number.

It is an amenable number.

811224481 is a deficient number, since it is larger than the sum of its proper divisors (1).

811224481 is an equidigital number, since it uses as much as digits as its factorization.

811224481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4096, while the sum is 31.

The square root of 811224481 is about 28482.0027561265. The cubic root of 811224481 is about 932.6392371635.

Adding to 811224481 its reverse (184422118), we get a palindrome (995646599).

The spelling of 811224481 in words is "eight hundred eleven million, two hundred twenty-four thousand, four hundred eighty-one".