520844081 has 2 divisors, whose sum is σ = 520844082. Its totient is φ = 520844080.

The previous prime is 520844069. The next prime is 520844099. The reversal of 520844081 is 180448025.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 335475856 + 185368225 = 18316^2 + 13615^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520844081 is a prime.

It is a super-2 number, since 2×520844081² = 542557113425469122, which contains 22 as substring.

It is a Chen prime.

It is equal to p_27394601 and since 520844081 and 27394601 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (520844581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260422040 + 260422041.

It is an arithmetic number, because the mean of its divisors is an integer number (260422041).

Almost surely, 2^520844081 is an apocalyptic number.

It is an amenable number.

520844081 is a deficient number, since it is larger than the sum of its proper divisors (1).

520844081 is an equidigital number, since it uses as much as digits as its factorization.

520844081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10240, while the sum is 32.

The square root of 520844081 is about 22822.0086977461. The cubic root of 520844081 is about 804.5800214043.

It can be divided in two parts, 52084 and 4081, that added together give a palindrome (56165).

The spelling of 520844081 in words is "five hundred twenty million, eight hundred forty-four thousand, eighty-one".