513500557 has 4 divisors (see below), whose sum is σ = 513612316. Its totient is φ = 513388800.

The previous prime is 513500551. The next prime is 513500563. The reversal of 513500557 is 755005315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 755005315 = 5 ⋅151001063.

It is an interprime number because it is at equal distance from previous prime (513500551) and next prime (513500563).

It can be written as a sum of positive squares in 2 ways, for example, as 169546441 + 343954116 = 13021^2 + 18546^2 .

It is a cyclic number.

It is not a de Polignac number, because 513500557 - 2³ = 513500549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513500551) 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 in 3 ways as a sum of consecutive naturals, for example, 48678 + ... + 58279.

It is an arithmetic number, because the mean of its divisors is an integer number (128403079).

Almost surely, 2^513500557 is an apocalyptic number.

It is an amenable number.

513500557 is a deficient number, since it is larger than the sum of its proper divisors (111759).

513500557 is a wasteful number, since it uses less digits than its factorization.

513500557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111758.

The product of its (nonzero) digits is 13125, while the sum is 31.

The square root of 513500557 is about 22660.5506773335. The cubic root of 513500557 is about 800.7807778387.

The spelling of 513500557 in words is "five hundred thirteen million, five hundred thousand, five hundred fifty-seven".