513425561 has 4 divisors (see below), whose sum is σ = 560100624. Its totient is φ = 466750500.

The previous prime is 513425533. The next prime is 513425569. The reversal of 513425561 is 165524315.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 513425561 - 2¹⁰ = 513424537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513425569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23337515 + ... + 23337536.

It is an arithmetic number, because the mean of its divisors is an integer number (140025156).

Almost surely, 2^513425561 is an apocalyptic number.

It is an amenable number.

513425561 is a deficient number, since it is larger than the sum of its proper divisors (46675063).

513425561 is a wasteful number, since it uses less digits than its factorization.

513425561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46675062.

The product of its digits is 18000, while the sum is 32.

The square root of 513425561 is about 22658.8958468854. The cubic root of 513425561 is about 800.7417916563.

Adding to 513425561 its reverse (165524315), we get a palindrome (678949876).

The spelling of 513425561 in words is "five hundred thirteen million, four hundred twenty-five thousand, five hundred sixty-one".