513534481 has 2 divisors, whose sum is σ = 513534482. Its totient is φ = 513534480.

The previous prime is 513534479. The next prime is 513534493. The reversal of 513534481 is 184435315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 417180625 + 96353856 = 20425^2 + 9816^2 .

It is a cyclic number.

It is not a de Polignac number, because 513534481 - 2¹ = 513534479 is a prime.

It is a super-2 number, since 2×513534481² = 527435326351878722, which contains 22 as substring.

Together with 513534479, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (513534401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256767240 + 256767241.

It is an arithmetic number, because the mean of its divisors is an integer number (256767241).

Almost surely, 2^513534481 is an apocalyptic number.

It is an amenable number.

513534481 is a deficient number, since it is larger than the sum of its proper divisors (1).

513534481 is an equidigital number, since it uses as much as digits as its factorization.

513534481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28800, while the sum is 34.

The square root of 513534481 is about 22661.2991904701. The cubic root of 513534481 is about 800.7984117624.

Adding to 513534481 its reverse (184435315), we get a palindrome (697969796).

The spelling of 513534481 in words is "five hundred thirteen million, five hundred thirty-four thousand, four hundred eighty-one".