513855 has 24 divisors (see below), whose sum is σ = 939120. Its totient is φ = 259200.

The previous prime is 513841. The next prime is 513871. The reversal of 513855 is 558315.

It is not a de Polignac number, because 513855 - 2⁴ = 513839 is a prime.

It is a super-2 number, since 2×513855² = 528093922050, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 513855.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 555 + ... + 1155.

It is an arithmetic number, because the mean of its divisors is an integer number (39130).

2⁵¹³⁸⁵⁵ is an apocalyptic number.

513855 is a deficient number, since it is larger than the sum of its proper divisors (425265).

513855 is a wasteful number, since it uses less digits than its factorization.

513855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631 (or 628 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 513855 is about 716.8368015106. The cubic root of 513855 is about 80.0964981379.

The spelling of 513855 in words is "five hundred thirteen thousand, eight hundred fifty-five".