820260481 has 2 divisors, whose sum is σ = 820260482. Its totient is φ = 820260480.

The previous prime is 820260451. The next prime is 820260509. The reversal of 820260481 is 184062028.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 487526400 + 332734081 = 22080^2 + 18241^2 .

It is a cyclic number.

It is not a de Polignac number, because 820260481 - 2⁵ = 820260449 is a prime.

It is a super-2 number, since 2×820260481² = 1345654513380702722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (820260451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410130240 + 410130241.

It is an arithmetic number, because the mean of its divisors is an integer number (410130241).

Almost surely, 2^820260481 is an apocalyptic number.

It is an amenable number.

820260481 is a deficient number, since it is larger than the sum of its proper divisors (1).

820260481 is an equidigital number, since it uses as much as digits as its factorization.

820260481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 820260481 is about 28640.1899609622. The cubic root of 820260481 is about 936.0892606239.

The spelling of 820260481 in words is "eight hundred twenty million, two hundred sixty thousand, four hundred eighty-one".