513605531 has 2 divisors, whose sum is σ = 513605532. Its totient is φ = 513605530.

The previous prime is 513605507. The next prime is 513605567. The reversal of 513605531 is 135506315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 513605531 - 2⁶ = 513605467 is a prime.

It is a super-2 number, since 2×513605531² = 527581282947583922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 513605494 and 513605503.

It is not a weakly prime, because it can be changed into another prime (513601531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256802765 + 256802766.

It is an arithmetic number, because the mean of its divisors is an integer number (256802766).

Almost surely, 2^513605531 is an apocalyptic number.

513605531 is a deficient number, since it is larger than the sum of its proper divisors (1).

513605531 is an equidigital number, since it uses as much as digits as its factorization.

513605531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6750, while the sum is 29.

The square root of 513605531 is about 22662.8667868829. The cubic root of 513605531 is about 800.8353415146.

The spelling of 513605531 in words is "five hundred thirteen million, six hundred five thousand, five hundred thirty-one".