513631255 has 4 divisors (see below), whose sum is σ = 616357512. Its totient is φ = 410905000.

The previous prime is 513631247. The next prime is 513631273. The reversal of 513631255 is 552136315.

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

It is not a de Polignac number, because 513631255 - 2³ = 513631247 is a prime.

It is a super-2 number, since 2×513631255² = 527634132225750050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51363121 + ... + 51363130.

It is an arithmetic number, because the mean of its divisors is an integer number (154089378).

Almost surely, 2^513631255 is an apocalyptic number.

513631255 is a deficient number, since it is larger than the sum of its proper divisors (102726257).

513631255 is a wasteful number, since it uses less digits than its factorization.

513631255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102726256.

The product of its digits is 13500, while the sum is 31.

The square root of 513631255 is about 22663.4343160960. The cubic root of 513631255 is about 800.8487112722.

The spelling of 513631255 in words is "five hundred thirteen million, six hundred thirty-one thousand, two hundred fifty-five".