518788481 has 2 divisors, whose sum is σ = 518788482. Its totient is φ = 518788480.

The previous prime is 518788477. The next prime is 518788493. The reversal of 518788481 is 184887815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 319837456 + 198951025 = 17884^2 + 14105^2 .

It is a cyclic number.

It is not a de Polignac number, because 518788481 - 2² = 518788477 is a prime.

It is a super-2 number, since 2×518788481² = 538282976036574722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (518788451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259394240 + 259394241.

It is an arithmetic number, because the mean of its divisors is an integer number (259394241).

Almost surely, 2^518788481 is an apocalyptic number.

It is an amenable number.

518788481 is a deficient number, since it is larger than the sum of its proper divisors (1).

518788481 is an equidigital number, since it uses as much as digits as its factorization.

518788481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 573440, while the sum is 50.

The square root of 518788481 is about 22776.9286998928. The cubic root of 518788481 is about 803.5201551038.

The spelling of 518788481 in words is "five hundred eighteen million, seven hundred eighty-eight thousand, four hundred eighty-one".