513500531 has 2 divisors, whose sum is σ = 513500532. Its totient is φ = 513500530.

The previous prime is 513500527. The next prime is 513500543. The reversal of 513500531 is 135005315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 513500531 - 2² = 513500527 is a prime.

It is a super-4 number, since 4×513500531⁴ (a number of 36 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 513500497 and 513500506.

It is not a weakly prime, because it can be changed into another prime (513500551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256750265 + 256750266.

It is an arithmetic number, because the mean of its divisors is an integer number (256750266).

Almost surely, 2^513500531 is an apocalyptic number.

513500531 is a deficient number, since it is larger than the sum of its proper divisors (1).

513500531 is an equidigital number, since it uses as much as digits as its factorization.

513500531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1125, while the sum is 23.

The square root of 513500531 is about 22660.5501036493. The cubic root of 513500531 is about 800.7807643234.

Adding to 513500531 its reverse (135005315), we get a palindrome (648505846).

The spelling of 513500531 in words is "five hundred thirteen million, five hundred thousand, five hundred thirty-one".