518857481 has 2 divisors, whose sum is σ = 518857482. Its totient is φ = 518857480.

The previous prime is 518857463. The next prime is 518857499. The reversal of 518857481 is 184758815.

It is a balanced prime because it is at equal distance from previous prime (518857463) and next prime (518857499).

It can be written as a sum of positive squares in only one way, i.e., 451945081 + 66912400 = 21259^2 + 8180^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-518857481 is a prime.

It is a super-2 number, since 2×518857481² = 538426171179330722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (518857181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259428740 + 259428741.

It is an arithmetic number, because the mean of its divisors is an integer number (259428741).

Almost surely, 2^518857481 is an apocalyptic number.

It is an amenable number.

518857481 is a deficient number, since it is larger than the sum of its proper divisors (1).

518857481 is an equidigital number, since it uses as much as digits as its factorization.

518857481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 358400, while the sum is 47.

The square root of 518857481 is about 22778.4433401407. The cubic root of 518857481 is about 803.5557768359. Note that the first 3 decimals are identical.

The spelling of 518857481 in words is "five hundred eighteen million, eight hundred fifty-seven thousand, four hundred eighty-one".