513003481 has 2 divisors, whose sum is σ = 513003482. Its totient is φ = 513003480.

The previous prime is 513003433. The next prime is 513003499. The reversal of 513003481 is 184300315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 341917081 + 171086400 = 18491^2 + 13080^2 .

It is a cyclic number.

It is not a de Polignac number, because 513003481 - 2⁹ = 513002969 is a prime.

It is a super-2 number, since 2×513003481² = 526345143036234722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (513003181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256501740 + 256501741.

It is an arithmetic number, because the mean of its divisors is an integer number (256501741).

Almost surely, 2^513003481 is an apocalyptic number.

It is an amenable number.

513003481 is a deficient number, since it is larger than the sum of its proper divisors (1).

513003481 is an equidigital number, since it uses as much as digits as its factorization.

513003481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 513003481 is about 22649.5801506341. The cubic root of 513003481 is about 800.5223052765.

Adding to 513003481 its reverse (184300315), we get a palindrome (697303796).

The spelling of 513003481 in words is "five hundred thirteen million, three thousand, four hundred eighty-one".