255513163 has 4 divisors (see below), whose sum is σ = 256456288. Its totient is φ = 254570040.

The previous prime is 255513151. The next prime is 255513217. The reversal of 255513163 is 361315552.

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 255513163 - 2⁵ = 255513131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255513263) 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, 471156 + ... + 471697.

It is an arithmetic number, because the mean of its divisors is an integer number (64114072).

Almost surely, 2^255513163 is an apocalyptic number.

255513163 is a deficient number, since it is larger than the sum of its proper divisors (943125).

255513163 is an equidigital number, since it uses as much as digits as its factorization.

255513163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943124.

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

The square root of 255513163 is about 15984.7791038850. The cubic root of 255513163 is about 634.5576624709.

The spelling of 255513163 in words is "two hundred fifty-five million, five hundred thirteen thousand, one hundred sixty-three".