513181087 has 2 divisors, whose sum is σ = 513181088. Its totient is φ = 513181086.

The previous prime is 513181079. The next prime is 513181121. The reversal of 513181087 is 780181315.

It is an a-pointer prime, because the next prime (513181121) can be obtained adding 513181087 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 513181087 - 2³ = 513181079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513181687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256590543 + 256590544.

It is an arithmetic number, because the mean of its divisors is an integer number (256590544).

Almost surely, 2^513181087 is an apocalyptic number.

513181087 is a deficient number, since it is larger than the sum of its proper divisors (1).

513181087 is an equidigital number, since it uses as much as digits as its factorization.

513181087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 34.

The square root of 513181087 is about 22653.5005462732. The cubic root of 513181087 is about 800.6146770733.

The spelling of 513181087 in words is "five hundred thirteen million, one hundred eighty-one thousand, eighty-seven".