513684523 has 4 divisors (see below), whose sum is σ = 560383128. Its totient is φ = 466985920.

The previous prime is 513684491. The next prime is 513684571. The reversal of 513684523 is 325486315.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 513684523 - 2⁵ = 513684491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513687523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23349286 + ... + 23349307.

It is an arithmetic number, because the mean of its divisors is an integer number (140095782).

Almost surely, 2^513684523 is an apocalyptic number.

513684523 is a deficient number, since it is larger than the sum of its proper divisors (46698605).

513684523 is a wasteful number, since it uses less digits than its factorization.

513684523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46698604.

The product of its digits is 86400, while the sum is 37.

The square root of 513684523 is about 22664.6094826273. The cubic root of 513684523 is about 800.8763952927.

The spelling of 513684523 in words is "five hundred thirteen million, six hundred eighty-four thousand, five hundred twenty-three".